520873920 has 252 divisors, whose sum is σ = 2084658264. Its totient is φ = 119024640.

The previous prime is 520873919. The next prime is 520873957. The reversal of 520873920 is 29378025.

It is a happy number.

520873920 is a `hidden beast` number, since 520 + 87 + 39 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 139275 + ... + 142965.

Almost surely, 2^520873920 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 520873920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042329132).

520873920 is an abundant number, since it is smaller than the sum of its proper divisors (1563784344).

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

520873920 is a wasteful number, since it uses less digits than its factorization.

520873920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728 (or 3708 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 520873920 is about 22822.6624213741. The cubic root of 520873920 is about 804.5953858263.

The spelling of 520873920 in words is "five hundred twenty million, eight hundred seventy-three thousand, nine hundred twenty".