390918856 has 32 divisors (see below), whose sum is σ = 768542400. Its totient is φ = 186056640.

The previous prime is 390918841. The next prime is 390918889. The reversal of 390918856 is 658819093.

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, 33790 + ... + 43858.

It is an arithmetic number, because the mean of its divisors is an integer number (24016950).

Almost surely, 2^390918856 is an apocalyptic number.

It is an amenable number.

390918856 is a deficient number, since it is larger than the sum of its proper divisors (377623544).

390918856 is a wasteful number, since it uses less digits than its factorization.

390918856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10309 (or 10305 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 390918856 is about 19771.6680125881. The cubic root of 390918856 is about 731.1876931742.

The spelling of 390918856 in words is "three hundred ninety million, nine hundred eighteen thousand, eight hundred fifty-six".