520113636 has 135 divisors (see below), whose sum is σ = 1590455097. Its totient is φ = 147782880.

The previous prime is 520113631. The next prime is 520113647. The reversal of 520113636 is 636311025.

The square root of 520113636 is 22806.

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

520113636 is a `hidden beast` number, since 5 + 20 + 1 + 1 + 3 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5731236 + 514382400 = 2394^2 + 22680^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (520113631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2873466 + ... + 2873646.

Almost surely, 2^520113636 is an apocalyptic number.

520113636 is the 22806-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520113636

520113636 is an abundant number, since it is smaller than the sum of its proper divisors (1070341461).

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

520113636 is a wasteful number, since it uses less digits than its factorization.

520113636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The cubic root of 520113636 is about 804.2037242709.

The spelling of 520113636 in words is "five hundred twenty million, one hundred thirteen thousand, six hundred thirty-six".