520823124 has 54 divisors (see below), whose sum is σ = 1340860794. Its totient is φ = 170411040.

The previous prime is 520823081. The next prime is 520823159. The reversal of 520823124 is 421328025.

It can be written as a sum of positive squares in only one way, i.e., 307371024 + 213452100 = 17532^2 + 14610^2 .

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1069209 + ... + 1069695.

Almost surely, 2^520823124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520823124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670430397).

520823124 is an abundant number, since it is smaller than the sum of its proper divisors (820037670).

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

520823124 is a wasteful number, since it uses less digits than its factorization.

520823124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 520823124 is about 22821.5495529992. The cubic root of 520823124 is about 804.5692300688.

The spelling of 520823124 in words is "five hundred twenty million, eight hundred twenty-three thousand, one hundred twenty-four".