390423880 has 64 divisors (see below), whose sum is σ = 1095223680. Its totient is φ = 121689600.

The previous prime is 390423841. The next prime is 390423899. The reversal of 390423880 is 88324093.

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 15 ways as a sum of consecutive naturals, for example, 60301 + ... + 66460.

It is an arithmetic number, because the mean of its divisors is an integer number (17112870).

Almost surely, 2^390423880 is an apocalyptic number.

It is an amenable number.

390423880 is an abundant number, since it is smaller than the sum of its proper divisors (704799800).

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

390423880 is a wasteful number, since it uses less digits than its factorization.

390423880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126790 (or 126786 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 390423880 is about 19759.1467427113. The cubic root of 390423880 is about 730.8789562804.

The spelling of 390423880 in words is "three hundred ninety million, four hundred twenty-three thousand, eight hundred eighty".