308 (number) explained

308 is the natural number following 307 and preceding 309.

Cardinal:	three hundred eight
Ordinal:	308th(three hundred eighth)
Factorization:	2^2 × 7^1 × 11^1
Divisor:	1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308
Roman:	CCCVIII

In mathematics

• 308 is nontotient.^[1]
• 308 is the totient sum of the first 41 integers.^[2]
• 308 is a heptagonal pyramidal number.
• 308 is the sum of two consecutive primes (151 + 157).

10 ^{308} is the largest power of ten that can be stored in double-precision floating-point format.

References

1. Nontotients: even numbers k such that phi(m)=k has no solution.
2. a(n) = Sum_ pi(k).