520904 has 32 divisors (see below), whose sum is σ = 1080000. Its totient is φ = 234432.

The previous prime is 520889. The next prime is 520913. The reversal of 520904 is 409025.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3422 + ... + 3570.

It is an arithmetic number, because the mean of its divisors is an integer number (33750).

2⁵²⁰⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

520904 is an abundant number, since it is smaller than the sum of its proper divisors (559096).

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

520904 is a wasteful number, since it uses less digits than its factorization.

520904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 520904 is about 721.7367941293. The cubic root of 520904 is about 80.4610873748.

Adding to 520904 its reverse (409025), we get a palindrome (929929).

The spelling of 520904 in words is "five hundred twenty thousand, nine hundred four".