|This article may be in need of reorganization to comply with
Wikipedia's layout guidelines. (April 2012)| |Divisors||1, 2, 4,
8| |Roman numeral (unicode)||Ⅷ, ⅷ| |Greek||η (or Η)| 8 (eight
//) is the natural number following 7 and preceding 9. The SI
prefix for 10008 is yotta (Y), and for its reciprocal, yocto
(y). It is the root word of two other numbers: eighteen (eight
and ten) and eighty (eight tens). Linguistically, it is derived
from Middle English eighte, and is presumably related to the
French huit. In mathematics  8 is a composite number, its proper
divisors being 1, 2, and 4. It is twice 4 or four times 2. Eight
is a power of two, being (two cubed), and is the first number of
the form , p being an integer greater than 1. It has an aliquot
sum of 7 in the 4 member aliquot sequence (8,7,1,0) being the
first member of 7-aliquot tree. It is symbolized by the Arabic
numeral (figure) All powers of 2 ;(), have an aliquot sum of one
less than themselves. A number is divisible by 8 if its last 3
digits are a