78 (seventy-eight) is the natural number following 77 and followed by 79. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... 77 (seventy-seven) is the natural number following 76 and preceding 78. ... 79 (seventy-nine) is the natural number following 78 and preceding 80. ...

← 70 71 72 73 74 75 76 77 78 79 → 69 (sixty-nine) is the natural number following 68 and preceding 70. ... Look up seventy in Wiktionary, the free dictionary. ... 71 is the natural number following 70 and preceding 72. ... 72 is the natural number following 71 and preceding 73. ... 73 (seventy-three) is the natural number following 72 and preceding 74. ... 74 is the natural number following 73 and preceding 75. ... 75 (seventy-five) is the natural number following 74 and preceding 76. ... 76 is the natural number following 75 and preceding 77. ... 77 (seventy-seven) is the natural number following 76 and preceding 78. ... 79 (seventy-nine) is the natural number following 78 and preceding 80. ... 80 (eighty) is the natural number following 79 and preceding 81. ... List of numbers — Integers This is a list of articles about numbers (not about numerals). ... The integers are commonly denoted by the above symbol. ... 0 10 20 30 40 50 60 70 80 90 → 0 (zero) is both a number and a numerical digit used to represent that number in numerals. ... 10 (ten) is an even natural number following 9 and preceding 11. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 30 (thirty) is the natural number following 29 and preceding 31. ... 40 (forty) is the natural number following 39 and preceding 41. ... 50 (fifty) is the number following 49 and preceding 51. ... 60 (sixty) is the natural number following 59 and preceding 61. ... Look up seventy in Wiktionary, the free dictionary. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 90 (ninety) is the natural number preceded by 89 and followed by 91. ... 100 (one hundred) (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. ...
Cardinal	78 seventy-eight
Ordinal	78th seventy-eighth
Factorization
Divisors	1, 2, 3, 6, 11, 13, 14, 26, 39, 51, 78
Roman numeral	LXXVIII
Binary	1001110
Hexadecimal	4E

Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ... 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. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... In mathematics and computer science, hexadecimal, base-16, 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. ...

In mathematics

78 is a triangular number, and its factorization makes it a sphenic number. As a multiple of perfect number, 78 is itself a semiperfect number. A triangular number is a natural number such that the shape of an equilateral triangle can be formed by that number of points. ... 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. ... A sphenic number is a positive integer that is the product of three distinct prime factors. ... In mathematics, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. ...

77 and 78 form a Ruth-Aaron pair under the second definition in which repeated prime factors are counted as often as they occur. A Ruth-Aaron pair consists of two consecutive integers (e. ...

Karl A. Dahlke proved in 1989 that 78 heptominos of this shape ( ), at a minimum, are required to fill a rectangle. 1989 (MCMLXXXIX) was a common year starting on Sunday of the Gregorian calendar. ... A polyomino is a polyform with the square as its base form. ... Image File history File links Heptomino-78. ...

In science

• The atomic number of platinum

In astronomy, It has been suggested that List of elements by atomic number be merged into this article or section. ... General Name, Symbol, Number platinum, Pt, 78 Chemical series transition metals Group, Period, Block 10, 6, d Appearance grayish white Atomic mass 195. ... A giant Hubble mosaic of the Crab Nebula, a supernova remnant Astronomy is the science of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earths atmosphere (such as auroras and cosmic background radiation). ...

Messier object M78, a magnitude 8.0 diffuse nebula in the constellation Orion

The New General Catalogue object NGC 78, a magnitude 12.8 barred spiral galaxy in the constellation Pisces

The Saros number of the solar eclipse series which began on -463 June 9 and ended on 817 July 18. The duration of Saros series 78 was 1280.1 years, and it contained 72 solar eclipses.

The Saros number of the lunar eclipse series which began on -125 April 10 and ended on 1155 May 18. The duration of Saros series 78 was 1280.1 years, and it contained 72 lunar eclipses.

The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... The Diffuse Nebula M78 (also known as Messier Object 78, Messier 78, M78, or NGC 2068) is a diffuse nebula in the Orion constellation. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, diffuse nebulae is the common term for both reflection nebulae and emission nebulae. ... This article or section does not cite its references or sources. ... Orion (IPA: ), a constellation often referred to as The Hunter, is a prominent constellation, perhaps the best-known and most conspicuous in the sky. ... The New General Catalogue (NGC) is the most well-known catalogue of deep sky objects in amateur astronomy. ... NGC 1300, viewed nearly face-on. ... For other uses, see Pisces. ... A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the sun and the moon. ... Photo taken during the 1999 eclipse. ... June 9 is the 160th day of the year in the Gregorian calendar (161st in leap years), with 205 days remaining. ... Events Louis the Pious divides his empire among his sons. ... July 18 is the 199th day (200th in leap years) of the year in the Gregorian Calendar, with 166 days remaining. ... A lunar eclipse occurs whenever the Moon passes through some portion of the Earths shadow. ... April 10 is the 100th day of the year in the Gregorian calendar (101st in leap years). ... Events Frederick I Barbarossa crowned Holy Roman Emperor. ... May 18 is the 138th day of the year in the Gregorian Calendar (139th in leap years). ...

In other fields

78 is also:

• The designation of Interstate 78, a freeway that runs from Pennsylvania to New York.
• In reference to gramophone records, 78 refers those meant to be spun at 78 revolutions per minute. Compare: LP, 33 and 45.
• A standard Tarot deck containing the 21 trump cards, the fool) and the 56 suit cards make up 78 cards.
• The number of the French département Yvelines
• The total number of gifts in the song The Twelve Days of Christmas (since 78 is the 12th triangular number).
• The year AD 78, 78 BC, or 1978.
• The number of lines that make up Metatron's Cube.
• The number of Josh White, defensive tackle for the Central A & M Raiders.

This Interstate Highway article needs to be cleaned up to conform to both a higher standard of article quality and accepted design standards outlined in the WikiProject U.S. Interstate Highways. ... Official language(s) English, Pennsylvania Dutch Capital Harrisburg Largest city Philadelphia Area  Ranked 33rd  - Total 46,055 sq mi (119,283 km²)  - Width 280 miles (455 km)  - Length 160 miles (255 km)  - % water 2. ... NY redirects here. ... The Beatles Magical Mystery Tour as a 33 â…“ LP vinyl record A gramophone record (also phonograph record, or simply record) is an analogue sound recording medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc. ... Revolutions per minute (abbreviated rpm, RPM, r/min, or min-1) is a unit of frequency, commonly used to measure rotational speed, in particular in the case of rotation around a fixed axis. ... The Beatles Magical Mystery Tour as a 33 â…“ LP vinyl record A gramophone record (also phonograph record, or simply record) is an analogue sound recording medium consisting of a flat disc with an inscribed modulated spiral groove starting near the periphery and ending near the center of the disc. ... 33 is the natural number following 32 and preceding 34. ... 45 is the natural number following 44 and followed by 46. ... Look up tarot in Wiktionary, the free dictionary. ... The four French playing card suits used primarily in the English-speaking world: spades, hearts, diamonds and clubs. ... A fool can refer to: A foolish person. ... The départements (or departments) are administrative units of France, roughly analogous to British counties. ... Yvelines is a French département in the région of ÃŽle-de-France. ... For other uses, see number 78. ... Centuries: 2nd century BC - 1st century BC - 1st century Decades: 120s BC 110s BC 100s BC 90s BC 80s BC - 70s BC - 60s BC 50s BC 40s BC 30s BC 20s BC Years: 83 BC 82 BC 81 BC 80 BC 79 BC - 78 BC - 77 BC 76 BC 75... 1978 (MCMLXXVIII) was a common year starting on Sunday. ... Metatron (Hebrew מטטרון or מיטטרון), is the name of an angel in Judaism and some branches of Christianity. ...

References

• Mark Steven Morton (2005). Dirty Words : The Story of Sex Talk. Atlantic. ISBN 1-84354-384-2.