520804 has 6 divisors (see below), whose sum is σ = 911414. Its totient is φ = 260400.

The previous prime is 520787. The next prime is 520813. The reversal of 520804 is 408025.

It is a happy number.

520804 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 123904 = 630^2 + 352^2 .

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 as a sum of consecutive naturals, namely, 65097 + ... + 65104.

2⁵²⁰⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

520804 is a deficient number, since it is larger than the sum of its proper divisors (390610).

520804 is a wasteful number, since it uses less digits than its factorization.

520804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130205 (or 130203 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 520804 is about 721.6675134714. The cubic root of 520804 is about 80.4559382343.

Adding to 520804 its reverse (408025), we get a palindrome (928829).

The spelling of 520804 in words is "five hundred twenty thousand, eight hundred four".