| 27 (number) |
Article Index for 27 |
Information About27 (number) |
IN MATHEMATICS Twenty-seven is a perfect Cube , being 33 = 3 × 3 × 3. 27 is 3↑↑2 (using Knuth's Up-arrow Notation ). There are exactly 27 straight lines on a Cubic Surface . 27 is also a Decagonal Number . In base 10, it is the first Composite Number not evenly divisible by any of its digits. It is the Radix (base) of the Septemvigesimal Positional Numeral System . In a Prime Reciprocal Magic Square of the multiples of 1/7, the magic constant is 27. It is the twenty-eighth (and twenty-ninth) digit in π . (3.141592653589793238462643383279). In base 10, it is a Smith Number and a Harshad Number . IN SCIENCE
Astronomy
IN OTHER FIELDS Twenty-seven is also:
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