390172056 has 32 divisors (see below), whose sum is σ = 976976640. Its totient is φ = 129851168.

The previous prime is 390172039. The next prime is 390172063. The reversal of 390172056 is 650271093.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965 + ... + 28091.

It is an arithmetic number, because the mean of its divisors is an integer number (30530520).

Almost surely, 2^390172056 is an apocalyptic number.

It is an amenable number.

390172056 is an abundant number, since it is smaller than the sum of its proper divisors (586804584).

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

390172056 is a wasteful number, since it uses less digits than its factorization.

390172056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25783 (or 25779 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 390172056 is about 19752.7733748960. The cubic root of 390172056 is about 730.7217831349.

It can be divided in two parts, 3901 and 72056, that added together give a palindrome (75957).

The spelling of 390172056 in words is "three hundred ninety million, one hundred seventy-two thousand, fifty-six".