520838408 has 8 divisors (see below), whose sum is σ = 976572030. Its totient is φ = 260419200.

The previous prime is 520838399. The next prime is 520838447. The reversal of 520838408 is 804838025.

It can be written as a sum of positive squares in only one way, i.e., 457189924 + 63648484 = 21382^2 + 7978^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32552393 + ... + 32552408.

Almost surely, 2^520838408 is an apocalyptic number.

It is an amenable number.

520838408 is a deficient number, since it is larger than the sum of its proper divisors (455733622).

520838408 is a wasteful number, since it uses less digits than its factorization.

520838408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65104807 (or 65104803 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 520838408 is about 22821.8844094873. The cubic root of 520838408 is about 804.5771002492.

The spelling of 520838408 in words is "five hundred twenty million, eight hundred thirty-eight thousand, four hundred eight".