521413808 has 20 divisors (see below), whose sum is σ = 1063410360. Its totient is φ = 246985344.

The previous prime is 521413793. The next prime is 521413819. The reversal of 521413808 is 808314125.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857285 + ... + 857892.

It is an arithmetic number, because the mean of its divisors is an integer number (53170518).

Almost surely, 2^521413808 is an apocalyptic number.

It is an amenable number.

521413808 is an abundant number, since it is smaller than the sum of its proper divisors (541996552).

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

521413808 is a wasteful number, since it uses less digits than its factorization.

521413808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715204 (or 1715198 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 521413808 is about 22834.4872506479. The cubic root of 521413808 is about 804.8732786653.

The spelling of 521413808 in words is "five hundred twenty-one million, four hundred thirteen thousand, eight hundred eight".