390977256 has 16 divisors (see below), whose sum is σ = 977443200. Its totient is φ = 130325744.

The previous prime is 390977233. The next prime is 390977263. The reversal of 390977256 is 652779093.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8145336 + ... + 8145383.

It is an arithmetic number, because the mean of its divisors is an integer number (61090200).

Almost surely, 2^390977256 is an apocalyptic number.

It is an amenable number.

390977256 is an abundant number, since it is smaller than the sum of its proper divisors (586465944).

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

390977256 is a wasteful number, since it uses less digits than its factorization.

390977256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16290728 (or 16290724 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 48.

The square root of 390977256 is about 19773.1448181618. The cubic root of 390977256 is about 731.2241024651.

The spelling of 390977256 in words is "three hundred ninety million, nine hundred seventy-seven thousand, two hundred fifty-six".