390668564 has 48 divisors (see below), whose sum is σ = 805814016. Its totient is φ = 163382400.

The previous prime is 390668563. The next prime is 390668573. The reversal of 390668564 is 465866093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390668563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208994 + ... + 210854.

It is an arithmetic number, because the mean of its divisors is an integer number (16787792).

Almost surely, 2^390668564 is an apocalyptic number.

It is an amenable number.

390668564 is an abundant number, since it is smaller than the sum of its proper divisors (415145452).

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

390668564 is a wasteful number, since it uses less digits than its factorization.

390668564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 390668564 is about 19765.3374370386. The cubic root of 390668564 is about 731.0316083503.

The spelling of 390668564 in words is "three hundred ninety million, six hundred sixty-eight thousand, five hundred sixty-four".