This article is about the number 300. For other uses, see 300 (disambiguation). For the year, see 300.

300 (three hundred) is the natural number following two hundred [and] ninety-nine and preceding three hundred [and] one. 300 may refer to: 300, the year 300 (number), the natural number 300 (comic book), a graphic novel by Frank Miller based on the Battle of Thermopylae 300 (film), a 2007 film based on the graphic novel and directed by Zack Snyder 300 (television), a Catalan public television channel Chrysler... Events Romano-Celtic temple-mausoleum complex is constructed in Lullingstone, and also in Anderida (approximate date). ... In mathematics, a natural number is either a positive integer (1, 2, 3, 4, ...) or a non-negative integer (0, 1, 2, 3, 4, ...). The former definition is generally used in number theory, while the latter is preferred in set theory and computer science. ...

In linguistics, cardinal numbers is the name given to number words that are used for quantity (one, two, three), as opposed to ordinal numbers, words that are used for order (first, second, third). ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system (base 2 numerals) represents numeric values using two symbols, typically 0 and 1. ... The octal numeral system is the base-8 number system, and uses the digits 0 to 7. ... A duodecimal multiplication table The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, base-16, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ... Hebrew redirects here. ...

Mathematical properties

It is a triangular number and the sum of a twin prime (149 + 151), as well as the sum of ten consecutive primes (13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47). It is a Harshad number. A triangular number is a number that can be arranged in the shape of an equilateral triangle. ... A twin prime is a prime number that differs from another prime number by two. ... A Harshad number, or Niven number, is an integer that is divisible by the sum of its digits in a given number base. ...

Other fields

Three hundred is

• In bowling, a perfect score, achieved by rolling strikes in all ten frames.
• The lowest possible Fair Isaac credit score.

Bowling ball and two pins Ten-pin bowling lane Bowling is a game in which players attempt to score points by rolling a ball along a flat surface to knock down objects called pins. ... In the United States, a credit score is a credit rating that represents an estimate of an individuals financial credit worthiness as calculated by a statistical model. ...

Integers from 301 to 399

301 = 7·43, is the sum of three consecutive primes (97 + 101 + 103). Moreover, it is a happy number. It's also a HTTP status code, indicating the content has been moved and the change is permanent. It's the North American Numbering Plan area code for Maryland. Consider the following process: given a number, take the sum of the squares of its digits. ... HTTP (for HyperText Transfer Protocol) is the primary method used to convey information on the World Wide Web. ... The North American Numbering Plan (NANP) is a system for three-digit area codes and seven-digit telephone numbers that direct telephone calls to particular regions on a public switched telephone network (PSTN), where they are further routed by the local network. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... This article does not cite its references or sources. ...

302 = 2·151, nontotient, also telephone area code for Delaware, also a HTTP status code indicating the content has been moved. Also the displacement of Ford's "5.0" V8. A nontotient is a positive integer n which is not in the range of Eulers totient function φ, that is, for which φ(x) = n has no solution. ... 302 is the area code for the state of Delaware in the United States. ... Official language(s) None Capital Dover Largest city Wilmington Area  Ranked 49th  - Total 2,491 sq mi (6,452 km²)  - Width 30 miles (48 km)  - Length 100 miles (161 km)  - % water 21. ... The Windsor engine is a 90-degree small-block V8 from Ford Motor Company. ...

303 = 3·101, also telephone area code for parts of Colorado, also a proposed HTTP status code. A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Official language(s) English Capital Denver Largest city Denver Area  Ranked 8th  - Total 104,185 sq mi (269,837 km²)  - Width 280 miles (451 km)  - Length 380 miles (612 km)  - % water 0. ...

304 = 2^4·19, sum of six consecutive primes (41 + 43 + 47 + 53 + 59 + 61), sum of eight consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47 + 53), primitive semiperfect number, untouchable number, nontotient, telephone area code for West Virginia, a HTTP code indicated the content has not been modified and record number of wickets taken in English cricket season by Tich Freeman in 1928. In mathematics, a primitive semiperfect number (also called a primitive pseudoperfect number, irreducible semiperfect number or irreducible pseudoperfect number) is a natural number that has no semiperfect proper divisor. ... An untouchable number is an integer that can not be expressed as the sum of the proper divisors of any integer. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Official language(s) English Capital Charleston Largest city Charleston Area  Ranked 41st  - Total 24,244 sq mi (62,809 km²)  - Width 130 miles (210 km)  - Length 240 miles (385 km)  - % water 0. ... Tich Freeman (Alfred Percy Freeman; born May 17, 1888; died January 28, 1965) was a Kent leg spin bowler and the only man to take 300 wickets in an English season. ...

305 = 5·61, also telephone area code for parts of Florida. A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... This article or section does not cite its references or sources. ...

306 = 2·3^2·17, sum of four consecutive primes (71 + 73 + 79 + 83), pronic number, Harshad number, untouchable number, also telephone area code for Saskatchewan. A pronic number, or oblong number or heteromecic number, is a number which is the product of two consecutive nonnegative integers, that is, n(n + 1). ... A Harshad number, or Niven number, is an integer that is divisible by the sum of its digits in a given number base. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Motto: Multis E Gentibus Vires (Latin: From many peoples, strength) Official languages English Flower Western Red Lily Tree Paper Birch Bird Sharp-tailed Grouse Capital Regina Largest city Saskatoon Lieutenant-Governor Gordon Barnhart Premier Lorne Calvert (NDP) Parliamentary representation  - House seats  - Senate seats 14 6 Area Total  - Land  - Water  (% of...

307, prime number, Chen prime, also telephone area code for Wyoming. In mathematics, a prime number (or a prime) is a natural number that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. ... A prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes (that is, if ,where is the Big Omega function. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Official language(s) English Capital Cheyenne Largest city Cheyenne Area  Ranked 10th  - Total 97,818 sq mi (253,348 km²)  - Width 280 miles (450 km)  - Length 360 miles (580 km)  - % water 0. ...

308 = 2^2·7·11, nontotient, totient sum of the first 31 integers, Harshad number.

309 = 3·103

310s

310 = 2·5·31, sphenic number, noncototient, self number. A sphenic number is a positive integer that is the product of three distinct prime factors. ... A noncototient is a positive integer n that can not be expressed as the difference between a positive integer m and the number of coprime integers below it. ... A self number or Colombian number is an integer which, in a given base, can not be generated by any other integer added to the sum of its digits. ...

311 has its own article. 311 is the number after 310 and before 312. ...

312 = 2^3·3·13, Harshad number, self number, Zuckerman number. Telephone area code for Bishkek, Kyrgyzstan and parts of central Chicago. A self number or Colombian number is an integer which, in a given base, can not be generated by any other integer added to the sum of its digits. ... A Zuckerman number is an integer that is divisible by the product of its digits in a given number base. ... Bishkek cityscape Bishkek (Бишкек) is the capital of Kyrgyzstan. ... Nickname: The Windy City, The Second City, Chi Town Motto: Urbs In Horto (Latin: City in a Garden), I Will Location in Chicagoland and Illinois Coordinates: Country United States State Illinois County Cook Incorporated March 4, 1837 Mayor Richard M. Daley (D) Area    - City 606. ...

313, prime number, palindromic prime, centered square number, also telephone area code for Detroit, Michigan. A palindromic prime is a prime number that is also a palindromic number. ... A centered square number is a centered figurate number that represents a square with a dot in the center and all other dots surrounding the center up to a certain city block distance, i. ... A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Nickname: Motor City, Motown Motto: Speramus Meliora; Resurget Cineribus (Latin for, We Hope For Better Things; It Shall Rise From the Ashes) Location in Wayne County, Michigan Coordinates: Country United States State Michigan County Wayne County Mayor Kwame Kilpatrick Area    - City 370. ...

314 = 2·157, nontotient, telephone area code for St. Louis, Missouri. A telephone numbering plan is a system that allows subscribers to make and receive telephone calls across long distances. ... Nickname: Gateway City, Gateway to the West, or Mound City Location in the state of Missouri Coordinates: Country United States State Missouri County Independent City Mayor Francis G. Slay (D) Area    - City 66. ...

315 = 3^2·5·7, Harshad number, Zuckerman number. A Zuckerman number is an integer that is divisible by the product of its digits in a given number base. ...

316 = 2^2·79, centered triangular number, centered heptagonal number. A centered triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers. ... A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. ...

317, prime number, Eisenstein prime with no imaginary part, Chen prime, strictly non-palindromic number. An Eisenstein prime is an Eisenstein integer aω + b that has only two Eisenstein divisors, the complex cube root of unity and aω + b itself. ...

318 = 2·3·53, sphenic number, nontotient.

319 = 11·29, sum of three consecutive primes (103 + 107 + 109), Smith number. 319 cannot be represented as the sum of fewer than 19 4th powers. A Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. ...

320s

320 = 2^6·5 = (2^5)·(2·5), Leyland number, maximum determinant of a 10 by 10 matrix of zeros and ones, Harshad number. A Leyland number is an integer of the form xy + yx with 1 < x ≤ y. ... In algebra, a determinant is a function depending on n that associates a scalar det(A) to every n×n square matrix A. The fundamental geometric meaning of a determinant is as the scale factor for volume when A is regarded as a linear transformation. ...

321 = 3·107

322 = 2·7·23, sphenic number, nontotient, Harshad number, untouchable number. Also seen as a Skull and Bones reference of power For the pirate flag see Jolly Roger; for the international poison symbol see skull and crossbones; for the Cypress Hill album see Skull & Bones. ...

323 = 17·19, sum of nine consecutive primes (19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53), Motzkin number, self number. A Motzkin number for a given number n is the number of different ways of drawing non-intersecting chords on a circle between n points. ...

324 = 2^2·3^4 = 18^2, sum of four consecutive primes (73 + 79 + 83 + 89), totient sum of the first 32 integers, untouchable number, Harshad number.

325 = 5^2·13, triangular number, hexagonal number, nonagonal number, centered nonagonal number. 325 is the smallest number to be the sum of two squares in 3 different ways: 1^2 + 18^2 , 6^2 + 17^2 and 10^2 + 15^2. A hexagonal number is a figurate number that represents a hexagon. ... A nonagonal number or enneagonal number is a figurate number that represents a nonagon. ... A centered nonagonal number is a centered figurate number that represents a nonagon with a dot in the center and all other dots surrounding the center dot in successive nonagonal layers. ...

326 = 2·163, nontotient, noncototient, untouchable number.

327 = 3·109; this number appears in all Star Wars movies. The cover of the 2004 DVD widescreen release of the revamped original Star Wars Trilogy. ...

328 = 2^3·41, sum of the first fifteen primes, refactorable number. A refactorable number or tau number is an integer n that is divisible by the count of its divisors, or to put it algebraically, n is such that . ...

329 = 7·47, sum of three consecutive primes (107 + 109 + 113), highly cototient number. In number theory, a branch of mathematics, a highly cototient number k is an integer that has more solutions to the equation x - &#966;(x) = k, where &#966; is Eulers totient function, than any integer below it, with the exception of 1. ...

330s

330 = 2·3·5·11, sum of six consecutive primes (43 + 47 + 53 + 59 + 61 + 67), pentatope number, Harshad number, divisible by the number of primes below it, also the number of dimples on a British golf ball. A pentatope number is a number in the fifth cell of any row of Pascals triangle starting with the 5-term row 1 4 6 4 1 either from left to right or from right to left. ... This article is about the sport. ...

331, prime number, cuban prime, sum of five consecutive primes (59 + 61 + 67 + 71 + 73), centered pentagonal number, centered hexagonal number, Mertens function returns 0. A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... A centered pentagonal number is a centered figurate number that represents a pentagon with a dot in the center and all other dots surrounding the center in successive pentagonal layers. ... A centered hexagonal number, or hex number is a centered figurate number that represents a hexagon with a dot in the center and all other dots surrounding the center dot in successive hexagonal layers. ... In number theory, the Mertens function is where &#956;(k) is the Möbius function. ...

332 = 2^2·83, Mertens function returns 0.

333 = 3^2·37, Mertens function returns 0, Harshad number.

334 = 2·167, nontotient, self number.

335 = 5·67, divisible by the number of primes below it.

336 = 2^4·3·7, Harshad number, untouchable number, also the number of dimples on an American golf ball.

337, prime number, permutable prime with 373 and 733, Chen prime, star number, AFI (a fire inside) Clandestine mystery number. A star number, or centered 12-gonal number, is a centered figurate number that represents a centered hexagram, such as the one that Chinese checkers are played on. ... AFI (A Fire Inside) is a rock band from Ukiah, California. ...

338 = 2·13^2, nontotient.

339 = 3·113

340s

340 = 2^2·5·17, sum of eight consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53 + 59), sum of ten consecutive primes (17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53), sum of the first four powers of 4 (4^1 + 4^2 + 4^3 + 4^4), divisible by the number of primes below it, nontotient, noncototient. This article discusses the number Four. ...

341 = 11·31, sum of seven consecutive primes (37 + 41 + 43 + 47 + 53 + 59 + 61), octagonal number, centered cube number, super-Poulet number. 341 = 11·31 is the least composite odd modulus m greater than the base b, that satisfies the Fermat property "b^(m-1) - 1 is divisible by m", for bases less than 100 of b = 2, 15, 60, 63 and 78. An octagonal number is a figurate number that represents an octagon. ... A centered cube number is a centered figurate number that represents a cube. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ...

342 = 2·3^2·19, pronic number, Harshad number, untouchable number.

343 = 7^3, nice Friedman number since 343 = (3 + 4)^3. It is z in a triplet (x,y,z) such that x^5 + y^2 = z^3. The number of New York City Firefighters who died September 11, 2001. A Friedman number is an integer which, in a given base, is the result of an expression using all its own digits in combination with any of the four basic arithmetic operators (+, -, ×, ÷) and sometimes exponentiation. ... The New York City Fire Department or the Fire Department of New York (FDNY) has the responsibility for protecting the citizens and property of New York Citys five boroughs from fires and fire hazards, as well as providing first response to biological, chemical and radioactive hazards. ... The World Trade Center on fire The September 11, 2001 attacks were a series of coordinated terrorist attacks against the United States on September 11, 2001. ...

344 = 2^3·43, octahedral number, noncototient, totient sum of the first 33 integers, refactorable number. An octahedral number is a figurate number that represents an octahedron, or two pyramids placed together, one upside-down underneath the other. ...

345 = 3·5·23, sphenic number, self number.

346 = 2·173, Smith number, noncototient.

347, prime number, safe prime, Eisenstein prime with no imaginary part, Chen prime, Friedman number since 347 = 7^3 + 4, strictly non-palindromic number. A safe prime is a prime number of the form 2p + 1, where p is also a prime. ...

348 = 2^2·3·29, sum of four consecutive primes (79 + 83 + 89 + 97), refactorable number.

349, prime number, sum of three consecutive primes (109 + 113 + 127).

350s

350 = 2·5^2·7, primitive semiperfect number, divisible by the number of primes below it, nontotient.

351 = 3^3·13, triangular number, sum of five consecutive primes (61 + 67 + 71 + 73 + 79), member of Padovan sequence, Harshad number. The Padovan sequence is the sequence of integers P(n) defined by the initial values and the recurrence relation The first few values of P(n) are 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 144, 151, 200. ...

352 = 2^5·11, the number of n-Queens Problem solutions for n = 9. One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ...

353, prime number, Eisenstein prime with no imaginary part, Chen prime, palindromic prime, Mertens function returns 0. 353 is the smallest 4th power that is the sum of 4 other 4th powers, discovered by Norrie in 1911: 353^4 = 30^4 + 120^4 + 272^4 + 215^4. 1911 (MCMXI) was a common year starting on Sunday (click on link for calendar). ...

354 = 2·3·59, sphenic number, nontotient, also SMTP code meaning start of mail input. Simple Mail Transfer Protocol (SMTP) is the de facto standard for email transmission across the Internet. ...

355 = 5·71, Smith number, Mertens function returns 0, divisible by the number of primes below it.

356 = 2^2·89, Mertens function returns 0, self number.

357 = 3·7·17, sphenic number.

358 = 2·179, sum of six consecutive primes (47 + 53 + 59 + 61 + 67 + 71), Mertens function returns 0.

359, prime number, safe prime, Eisenstein prime with no imaginary part, Chen prime, strictly non-palindromic number.

360s

360 has its own article. 360（Three hundred sixty） is the natural number following 359 and preceding 361. ...

361 = 19^2, centered triangular number, centered octagonal number, centered decagonal number, also the number of positions on a standard 19 x 19 Go board. A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers. ... A centered decagonal number is a centered figurate number that represents a decagon with a dot in the center and all other dots surrounding the center dot in successive decagonal layers. ... Go is a strategic, two-player board game originating in ancient China between 2000 BC and 200 BC. Go is a popular game in East Asia. ...

362 = 2·181, Mertens function returns 0, nontotient, noncototient.

363 = 3·11^2, sum of nine consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59), Mertens function returns 0. 363 is a number inbetween 362 and 364. ...

364 = 2^2·7·13, tetrahedral number, Mertens function returns 0, nontotient, Harshad number. It is a repdigit in base 3 (111111), base 9 (444), base 25 (EE), base 27 (DD), base 51 (77) and base 90 (44). The total number of gifts received in the song "The Twelve Days of Christmas". A pyramid with side length 5 contains 35 spheres. ... In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system. ... Twelve Days of Christmas is a traditional Christmas song, or Christmas carol. ...

365 = 5·73 = 10^2 + 11^2 + 12^2 = 13^2 + 14^2, centered square number, the approximate number of solar days in a tropical year. Several varieties of calendar have resulted from attempts to divide the 29.5-day lunar month and traditional 7-day week into the 365.25 day year. Previous number: 364 Next number: 366 365 is a semiprime centered square number. ... A centered square number is a centered figurate number that represents a square with a dot in the center and all other dots surrounding the center up to a certain city block distance, i. ... Solar time is based on the idea that, when the sun reaches its highest point in the sky, it is noon. ... A tropical year is the length of time that the Sun, as viewed from the Earth, takes to return to the same position along the ecliptic (its path among the stars on the celestial sphere). ... A page from the Hindu calendar 1871-72. ... In lunar calendars, a lunar month is the time between two successive similar syzygies (new moons or full moons). ...

366 = 2·3·61, sphenic number, Mertens function returns 0, noncototient. Also, the number of days in a leap year; it is 26-gonal and 123-gonal. A sphenic number is a positive integer that is the product of three distinct prime factors. ... A leap year (or intercalary year) is a year containing an extra day, week or month in order to keep the calendar year synchronised with the astronomical or seasonal year. ...

367, prime number, self number, strictly non-palindromic number.

368 = 2^4·23, Leyland number. A Leyland number is an integer of the form xy + yx with 1 < x ≤ y. ...

369 is the magic constant of the 9×9 magic square and n-Queens Problem for n = 9; there are 369 free polyominoes of order 8. With 370, a Ruth-Aaron pair with only distinct prime factors counted. The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... In recreational mathematics, a magic square of order n is an arrangement of n² numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A polyomino is a polyform with the square as its base form. ... A Ruth-Aaron pair consists of two consecutive integers (e. ...

370s

370 = 2·5·37, sphenic number, sum of four consecutive primes (83 + 89 + 97 + 101), nontotient, with 369 part of a Ruth-Aaron pair with only distinct prime factors counted, Harshad number.

371 = 7·53, Armstrong number since 3^3 + 7^3 + 1^3 = 371, sum of three consecutive primes (113 + 127 + 131), sum of seven consecutive primes (41 + 43 + 47 + 53 + 59 + 61 + 67), sum of the primes from its least to its greatest prime factor (sequence A055233 in OEIS), the next such composite number is 2935561623745. In number theory, a narcissistic number or pluperfect digital invariant (PPDI) or Armstrong number is a number that is the sum of its own digits to the power of the number of digits. ... The On-Line Encyclopedia of Integer Sequences (OEIS) is an extensive searchable database of integer sequences, freely available on the Web. ...

372 = 2^2·3·31, sum of eight consecutive primes (31 + 37 + 41 + 43 + 47 + 53 + 59 + 61), Harshad number, noncototient, untouchable number, refactorable number.

373, prime number, balanced prime, sum of five consecutive primes (67 + 71 + 73 + 79 + 83), permutable prime with 337 and 733, palindromic prime. A balanced prime is a prime number that is equal to the arithmetic mean of the nearest prime above and below. ...

374 = 2·11·17, sphenic number, nontotient. A sphenic number is a positive integer that is the product of three distinct prime factors. ...

375 = 3·5^3, Harshad number, also spur routes of Interstate 75 in the United States. Interstate 75 (abbreviated I-75) is an interstate highway in the midwest and southeastern United States. ...

376 = 2^3·47, 1-automorphic number, nontotient, refactorable number. In mathematics an automorphic number is a number whose square ends in the number itself. ...

377 = 13·29, Fibonacci number, sum of the squares of the first six primes. In mathematics, the Fibonacci numbers form a sequence defined recursively by: That is, after two starting values, each number is the sum of the two preceding numbers. ...

378 = 2·3^3·7, triangular number, hexagonal number, Smith number, Harshad number, self number.

379, prime number, Chen prime.

380s

380 = 2^2·5·19, pronic number, also, model number of the Airbus A380, the largest aircraft as of 2005. The Airbus A380 is a double-deck, four-engined airliner manufactured by Airbus S.A.S. It first flew on April 27, 2005 from Toulouse in France. ...

381 = 3·127, sum of the first sixteen primes. Palindrome in base 2 and base 8.

382 = 2·191, sum of ten consecutive primes (19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59), Smith number.

383, prime number, safe prime, Woodall prime, Thabit number, Eisenstein prime with no imaginary part, palindromic prime. In mathematics, a Woodall number or Riesel number is a natural number of the form n · 2n &#8722; 1 (written Wn). ... A Thabit number is an integer of the form . ...

384 = 2^7·3, sum of a twin prime (191 + 193), sum of six consecutive primes (53 + 59 + 61 + 67 + 71 + 73), double factorial of 8, sum of the totient sums of the first 35 integers, refactorable number, Zuckerman number. Three hundred and eighty four is an even composite positive integer. ... In mathematics, the factorial of a natural number n is the product of the positive integers less than or equal to n. ... Look up eight in Wiktionary, the free dictionary. ...

385 = 5·7·11, sphenic number, square pyramidal number. A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ...

386 = 2·193, nontotient, noncototient, nonagonal number, centered heptagonal number, also shorthand for the Intel 80386 microprocessor chip. Intel 80386 DX, 33MHz, foreground The Intel 80386 is a microprocessor which was used as the central processing unit (CPU) of many personal computers from 1986 until 1994 and later. ...

387 = 3^2·43, also shorthand for the Intel 80387, math coprocessor chip to the 386.

388 = 2^2·97

389, prime number, Eisenstein prime with no imaginary part, Chen prime, highly cototient number, self number, strictly non-palindromic number.

390s

390 = 2·3·5·13, sum of four consecutive primes (89 + 97 + 101 + 103), nontotient.

391 = 17·23, Smith number, centered pentagonal number.

392 = 2^3·7^2, Harshad number.

393 = 3·131, Mertens function returns 0.

394 = 2·197, nontotient, noncototient.

395 = 5·79, sum of three consecutive primes (127 + 131 + 137), sum of five consecutive primes (71 + 73 + 79 + 83 + 89).

396 = 2^2·3^2·11, sum of a twin prime (197 + 199), totient sum of the first 36 integers, refactorable number, Harshad number.

397, prime number, cuban prime, centered hexagonal number.

398 = 2·199, nontotient.

399 = 3·7·19, sphenic number, Harshad number.