306681864 has 32 divisors (see below), whose sum is σ = 768100320. Its totient is φ = 102041216.

The previous prime is 306681857. The next prime is 306681877. The reversal of 306681864 is 468186603.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2164 + ... + 24860.

It is an arithmetic number, because the mean of its divisors is an integer number (24003135).

Almost surely, 2^306681864 is an apocalyptic number.

It is an amenable number.

306681864 is an abundant number, since it is smaller than the sum of its proper divisors (461418456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306681864 is a wasteful number, since it uses less digits than its factorization.

306681864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23269 (or 23265 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 306681864 is about 17512.3346244868. The cubic root of 306681864 is about 674.3665673521.

The spelling of 306681864 in words is "three hundred six million, six hundred eighty-one thousand, eight hundred sixty-four".