394931328 has 64 divisors (see below), whose sum is σ = 1144415520. Its totient is φ = 119674880.

The previous prime is 394931297. The next prime is 394931353. The reversal of 394931328 is 823139493.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 394931328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42525 + ... + 50972.

Almost surely, 2^394931328 is an apocalyptic number.

It is an amenable number.

394931328 is an abundant number, since it is smaller than the sum of its proper divisors (749484192).

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

394931328 is a wasteful number, since it uses less digits than its factorization.

394931328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93525 (or 93513 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 394931328 is about 19872.8792076035. The cubic root of 394931328 is about 733.6808696154.

The spelling of 394931328 in words is "three hundred ninety-four million, nine hundred thirty-one thousand, three hundred twenty-eight".