One thousand million (1,000,000,000) is the natural number following 999,999,999 and preceding 1,000,000,001. 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. ... The long and short scales are two different numerical systems used throughout the world. ... 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 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, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ...

In scientific notation, it is written as 10⁹. Scientific notation is a scheme for writing numbers that is often used by scientists and mathematicians to easily write large and small numbers. ...

In modern ('short scale') English language usage, it is usually called a billion (although in many other languages and 'long scale' usage, a billion means a million millions (or 1,000,000,000,000), instead of a thousand millions). The long and short scales are two different numerical systems used throughout the world. ... Billion may mean: 1,000,000,000 (one thousand million; ), used by most English-speaking countries (American and usual modern British meaning) 1,000,000,000,000 (one million million; ), used by most other countries outside Asia (older British meaning). ... The long and short scales are two different numerical systems used throughout the world. ... This list compares various sizes of positive numbers, including counts of things, dimensionless numbers and probabilities. ...

The term milliard can also be used to refer to 1,000,000,000, though this terminology is rarely used in the English language, but often in other languages. Milliard is a French-derived word meaning the number 109 (one thousand million). ... The long and short scales are two different numerical systems used throughout the world. ...

Physical quantities can be expressed using the SI prefix giga. An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple (supramultiple or submultiple). ... Look up giga- in Wiktionary, the free dictionary. ...

See Orders of magnitude (numbers) for larger numbers; and long and short scales. This list compares various sizes of positive numbers, including counts of things, dimensionless numbers and probabilities. ... The long and short scales are two different numerical systems used throughout the world. ...

Selected 100-digit numbers

• 1023456789 - smallest pandigital number
• 1073676287 - Carol number
• 1073741824 = 2³⁰
• 1073807359 - Kynea number
• 1111111111 - repunit
• 1129760415 - Motzkin number
• 1134903170 - Fibonacci number
• 1162261467 = 3¹⁹
• 1220703125 = 5¹²
• 1234567890 - pandigital number with the digits in order
• 1311738121 - Pell number
• 1382958545 - Bell number
• 1406818759 - Wedderburn-Etherington number
• 1836311903 - Fibonacci number
• 1977326743 = 7¹¹
• 2147483647 - Mersenne prime, also the largest signed 32-bit integer
• 2147483648 = 2³¹
• 2214502422 - primary pseudoperfect number
• 2222222222 - repdigit
• 2357947691 = 11⁹
• 2971215073 - Fibonacci prime
• 3166815962 - Pell number
• 3192727797 - Motzkin number
• 3323236238 - Wedderburn-Etherington number
• 3333333333 - repdigit
• 3486784401 = 3²⁰
• 4294836223 - Carol number
• 4294967296 = 2³²
• 4295098367 - Kynea number
• 4444444444 - repdigit
• 4807526976 - Fibonacci number
• 5555555555 - repdigit
• 5784634181 - alternating factorial
• 6210001000 - the only self-descriptive number in base 10
• 6227020800 = 13!
• 6666666666 - repdigit
• 6983776800 - colossally abundant number
• 7645370045 - Pell number
• 7777777777 - repdigit
• 7778742049 - Fibonacci number
• 7862958391 - Wedderburn-Etherington number
• 8589869056 - perfect number
• 8589934592 = 2³³
• 8888888888 - repdigit
• 9043402501 - Motzkin number
• 9814072356 - largest square pandigital number, largest pandigital pure power
• 9876543210 - largest pandigital number without redundant digits
• 9999999999 - repdigit

A pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once. ... A Carol number, named after Carol G. Kirnon, is an integer of the form . ... A Kynéa number (pronounced: Ka-Nay), named after Kynéa R. Griffith, is an integer of the form . ... In recreational mathematics, a repunit is a number like 11, 111, or 1111 that contains only the digit 1. ... In mathematics, 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. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above - see golden spiral. ... In mathematics, the Pell numbers and companion Pell numbers (Pell-Lucas numbers) are both sequences of integers. ... The Bell numbers, named in honor of Eric Temple Bell, are a sequence of integers arising in combinatorics that begins thus (sequence A000110 in OEIS): In general, Bn is the number of partitions of a set of size n. ... A Wedderburn-Etherington number counts how many weakly binary trees can be constructed such that each graph vertex (not counting the root vertex) is adjacent to no more than three other such vertices, for a given number of nodes. ... In mathematics, a Mersenne number is a number that is one less than a power of two. ... In mathematics, and in particular number theory, a primary pseudoperfect number is a number N that satisfies the Egyptian fraction equation where the sum is over only the prime divisors of N. Equivalently (as can be seen by multiplying this equation by N), Except for the exceptional primary pseudoperfect number... In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system. ... An alternating factorial is the sum of the first n factorials with the odd-indexed factorials multiplied by −1 if n is even, and the even-indexed factorials multiplied by −1 if n is odd, resulting in an alternation of signs of the summands (or alternation of addition and subtraction... A self-descriptive number is an integer m that in a given base b is b-digits long in which each digit d at position n (the most significant digit being at position 0 and the least significant at position b - 1) counts how many instances of digit n are... For factorial rings in mathematics, see unique factorisation domain. ... In mathematics, a colossally abundant number (sometimes abbreviated as CA) is a certain kind of natural number. ... In mathematics, a perfect number is defined as an integer which is the sum of its proper positive divisors, that is, the sum of the positive divisors not including the number. ... 9814072356 is 99066 squared, and is the eighty seventh and largest square number using the digits 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 exactly once - a pandigital number that is also a square, (sequence A036745 in OEIS). ...

Sense of scale

The facts below give a sense of how large one billion (one thousand million, 10⁹) is in the context of passage of time.

• One billion seconds is 31 years.
• About a billion minutes ago, the Roman Empire was flourishing. (One billion minutes is roughly 1,900 years.)
• About a billion hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (One billion hours is roughly 114,000 years.)
• About a billion days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas. (One billion days is roughly 2.7 million years.)
• About a billion months ago, dinosaurs walked the earth during the late Cretaceous. (One billion months is roughly 82 million years.)
• About a billion years ago, the first multicellular organisms appeared on Earth. (The universe is currently thought to be about 13.7 billion years old.)

In terms of distance: Motto: Senatus Populusque Romanus (SPQR) The Roman Empire at its greatest extent, c. ... Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin: wise man or knowing man) under the family Hominidae (the great apes). ... This article or section does not adequately cite its references or sources. ... Stone Age fishing hook. ... The Middle Paleolithic (or Middle Palaeolithic) is the second subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. ... A day is any of several different units of time. ... Species †A. afarensis (Lucy) †A. africanus †A. anamensis †A. bahrelghazali †A. garhi Formerly Australopithecus, now Paranthropus † † † For the song Australopithecus by Modest Mouse, see Sad Sappy Sucker. ... Savanna at Ngorongoro Conservation Area, Tanzania. ... Look up Month in Wiktionary, the free dictionary. ... Orders & Suborders Saurischia Sauropodomorpha Theropoda Ornithischia Thyreophora Ornithopoda Marginocephalia Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. ... The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i. ... Wild-type Caenorhabditis elegans hermaphrodite stained to highlight the nuclei of all cells Multicellular organisms are organisms consisting of more than one cell, and having differentiated cells that perform specialized functions. ... This timeline of the evolution of life outlines the major events in the development of life on the planet Earth. ... Universe is a word derived from the Old French univers, which in turn comes from the Latin roots unus (one) and versus (a form of vertere, to turn). Based on observations of the observable universe, physicists attempt to describe the whole of space-time, including all matter and energy and...

• A billion centimeters is about the distance from Chicago, Illinois, USA to Tokyo, Japan.
• A billion inches is 15,783 miles, more than halfway around the world and sufficient to reach any point on the globe from any other point.
• A billion meters is almost three times the distance from the Earth to the Moon.
• A billion kilometers is over six times the distance from the Earth to the Sun.

In terms of count: This article is being considered for deletion in accordance with Wikipedias deletion policy. ... Nickname: The Windy City, The Second City, Chi Town, City of the Big Shoulders, The 312, The City that Works, Second City (reference to when Chicago was second in population and prestige to New York). ... Official language(s) English Capital Springfield Largest city Chicago Area  Ranked 25th  - Total 57,918 sq mi (149,998 km²)  - Width 210 miles (340 km)  - Length 390 miles (629 km)  - % water 4. ... This article or section does not adequately cite its references or sources. ... An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ... A mile is a unit of length, usually used to measure distance, in a number of different systems, including Imperial units, United States customary units and Norwegian/Swedish mil. ... The metre, or meter (symbol: m) is the SI base unit of length. ... Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ... Apparent magnitude: up to -12. ... A kilometer (Commonwealth spelling: kilometre), symbol: km is a unit of length in the metric system equal to 1,000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... The Sun is the star at the center of the Solar System. ...

Image File history File links No higher resolution available. ...

A is a cube; B consists of 1000 cubes of type A. C consists of 1000 Bs; and D 1000 Cs. Thus there are 1 million As in C; and 1 billion As in D. Likewise, there are a billion cubic millimeters in a cubic meter.

In finance, the possession of one billion United States dollars allows one to be ranked among the world's wealthiest individuals. ISO 4217 Code USD User(s) the United States, the British Indian Ocean Territory[1], the British Virgin Islands, East Timor, Ecuador, El Salvador, the Marshall Islands, Micronesia, Palau, Panama, Turks and Caicos Islands, and the insular areas of the United States Inflation 2. ... // List of billionaires (2007) - World wide in U.S. dollars List of billionaires (2006) - World wide in U.S. dollars List of billionaires (2005) - World wide in U.S. dollars List of billionaires (2004) - World wide in U.S. dollars Forbes 400 Overclass Business oligarch, for New Russian billionaires List...