520569856 has 99 divisors (see below), whose sum is σ = 1124067063. Its totient is φ = 240936960.

The previous prime is 520569827. The next prime is 520569943. The reversal of 520569856 is 658965025.

The square root of 520569856 is 22816.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16792561 + ... + 16792591.

Almost surely, 2^520569856 is an apocalyptic number.

520569856 is the 22816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520569856

520569856 is an abundant number, since it is smaller than the sum of its proper divisors (603497207).

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

520569856 is an equidigital number, since it uses as much as digits as its factorization.

520569856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 46.

The cubic root of 520569856 is about 804.4387925174.

The spelling of 520569856 in words is "five hundred twenty million, five hundred sixty-nine thousand, eight hundred fifty-six".