520839864 has 24 divisors (see below), whose sum is σ = 1410608160. Its totient is φ = 173613264.

The previous prime is 520839821. The next prime is 520839877. The reversal of 520839864 is 468938025.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3616872 + ... + 3617015.

It is an arithmetic number, because the mean of its divisors is an integer number (58775340).

Almost surely, 2^520839864 is an apocalyptic number.

It is an amenable number.

520839864 is an abundant number, since it is smaller than the sum of its proper divisors (889768296).

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

520839864 is a wasteful number, since it uses less digits than its factorization.

520839864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233899 (or 7233892 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 520839864 is about 22821.9163086714. The cubic root of 520839864 is about 804.5778499783.

The spelling of 520839864 in words is "five hundred twenty million, eight hundred thirty-nine thousand, eight hundred sixty-four".