390638164 has 24 divisors (see below), whose sum is σ = 815246208. Its totient is φ = 160137120.

The previous prime is 390638153. The next prime is 390638179. The reversal of 390638164 is 461836093.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 302647 + ... + 303934.

It is an arithmetic number, because the mean of its divisors is an integer number (33968592).

Almost surely, 2^390638164 is an apocalyptic number.

It is an amenable number.

390638164 is an abundant number, since it is smaller than the sum of its proper divisors (424608044).

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

390638164 is a wasteful number, since it uses less digits than its factorization.

390638164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606615 (or 606613 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 390638164 is about 19764.5683990316. The cubic root of 390638164 is about 731.0126460385.

The spelling of 390638164 in words is "three hundred ninety million, six hundred thirty-eight thousand, one hundred sixty-four".