306691328 has 18 divisors (see below), whose sum is σ = 612185154. Its totient is φ = 153345536.

The previous prime is 306691313. The next prime is 306691349. The reversal of 306691328 is 823196603.

It can be written as a sum of positive squares in only one way, i.e., 305830144 + 861184 = 17488^2 + 928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 306691291 and 306691300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598751 + ... + 599262.

Almost surely, 2^306691328 is an apocalyptic number.

It is an amenable number.

306691328 is a deficient number, since it is larger than the sum of its proper divisors (305493826).

306691328 is an equidigital number, since it uses as much as digits as its factorization.

306691328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198029 (or 1198015 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 306691328 is about 17512.6048319489. The cubic root of 306691328 is about 674.3735041165.

The spelling of 306691328 in words is "three hundred six million, six hundred ninety-one thousand, three hundred twenty-eight".