Monday, January 23, 2006


In Wikipedia! :)

27 (twenty-seven) is the natural number following 26 and preceding 28. Twenty-seven is the smallest positive integer requiring four syllables to name in English, though it can be unambiguously defined in just two: "three cubed". It is the first composite number not divisible by any of its digits. It is the radix (base) of the septemvigesimal positional numeral system.

Twenty-seven is a perfect cube, being 33 = 3 × 3 × 3. 27 is 3↑↑2 (using Knuth's up-arrow notation). It is also a decagonal number. It is the magic result of a prime reciprocal magic square of the multiples of 1/7. It is a Smith number and a Harshad number. There are exactly 27 straight lines on a cubic surface. It is the twenty-eighth (and twenty-ninth) digit in π. (3.141592653589793238462643383279).

A 10,000-day-old person is 27 years old.

Twenty-seven is also:

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