264921390 has 24 divisors (see below), whose sum is σ = 688795848. Its totient is φ = 70645680.

The previous prime is 264921367. The next prime is 264921403. The reversal of 264921390 is 93129462.

264921390 is a `hidden beast` number, since 2 + 649 + 2 + 1 + 3 + 9 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1471696 + ... + 1471875.

It is an arithmetic number, because the mean of its divisors is an integer number (28699827).

Almost surely, 2^264921390 is an apocalyptic number.

264921390 is an abundant number, since it is smaller than the sum of its proper divisors (423874458).

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

264921390 is a wasteful number, since it uses less digits than its factorization.

264921390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943584 (or 2943581 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 264921390 is about 16276.4059300572. The cubic root of 264921390 is about 642.2523100627.

The spelling of 264921390 in words is "two hundred sixty-four million, nine hundred twenty-one thousand, three hundred ninety".