1000000000 (number)
"Billion" redirects here. For details on the differing meanings of "billion", see long and short scales. For the manufacturer, see billion (company)One thousand million (1,000,000,000) is the
natural number following 999,999,999 and preceding 1,000,000,001. In English, it is usually called a
billion or a "thousand million". (A
milliard can also be used to refer to 1,000,000,000, though this terminology is much rarer). In
other languages, billion rarely means 1,000,000,000.
In
scientific notation, it is written as 10
9. Physical quantities can be expressed using the
SI prefix giga.
See
Orders of magnitude (numbers) for larger numbers.
*
1023456789 - smallest
pandigital number*
1073676287 -
Carol number*
1073807359 -
Kynea number*
1111111111 -
repunit*
1129760415 -
Motzkin number*
1134903170 -
Fibonacci number*
1162261467 = 3^19
*
1220703125 = 5^12
*
1234567890 - pandigital number with the digits in order
*
1311738121 -
Pell number*
1382958545 -
Bell number*
1406818759 -
Wedderburn-Etherington number*
1836311903 -
Fibonacci prime*
2222222222 -
repdigit*
2971215073 - Fibonacci prime
*
3166815962 - Pell number
*
3192727797 - Motzkin number
*
3323236238 - Wedderburn-Etherington number
*
3333333333 - repdigit
*
3486784401 = 3^20
*
4294836223 - Carol number
*
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
*
8888888888 - repdigit
*
9043402501 - Motzkin number
*
9814072356 - largest square pandigital number, largest pandigital pure power
*
9876543210 - largest pandigital number without redundant digits
*
9999999999 - repdigit
The facts below give a sense of how large one billion (one thousand million, 10
9) is in the context of passage of time.
*About a billion seconds ago, the parents of
middle school children were themselves in
elementary school. (One billion seconds is roughly 31.7 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 now thought to be about 13.7 billion years old.)
In terms of distance:
*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:
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.
