520842564 has 54 divisors (see below), whose sum is σ = 1447155710. Its totient is φ = 157829760.

The previous prime is 520842551. The next prime is 520842571. The reversal of 520842564 is 465248025.

It is a happy number.

520842564 is a `hidden beast` number, since 52 + 0 + 8 + 42 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 503553600 + 17288964 = 22440^2 + 4158^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55429 + ... + 64140.

Almost surely, 2^520842564 is an apocalyptic number.

It is an amenable number.

520842564 is an abundant number, since it is smaller than the sum of its proper divisors (926313146).

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

520842564 is a wasteful number, since it uses less digits than its factorization.

520842564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119601 (or 119585 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 520842564 is about 22821.9754622601. The cubic root of 520842564 is about 804.5792402690.

The spelling of 520842564 in words is "five hundred twenty million, eight hundred forty-two thousand, five hundred sixty-four".