264657990 has 32 divisors (see below), whose sum is σ = 640037376. Its totient is φ = 70035680.

The previous prime is 264657983. The next prime is 264658007. The reversal of 264657990 is 99756462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29742 + ... + 37601.

It is an arithmetic number, because the mean of its divisors is an integer number (20001168).

Almost surely, 2^264657990 is an apocalyptic number.

264657990 is an abundant number, since it is smaller than the sum of its proper divisors (375379386).

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

264657990 is a wasteful number, since it uses less digits than its factorization.

264657990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67484.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 264657990 is about 16268.3124508967. The cubic root of 264657990 is about 642.0393848180.

The spelling of 264657990 in words is "two hundred sixty-four million, six hundred fifty-seven thousand, nine hundred ninety".