520256404 has 48 divisors (see below), whose sum is σ = 999230400. Its totient is φ = 236065536.

The previous prime is 520256357. The next prime is 520256411. The reversal of 520256404 is 404652025.

It is a super-2 number, since 2×520256404² = 541333451806022432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301087 + ... + 302809.

It is an arithmetic number, because the mean of its divisors is an integer number (20817300).

Almost surely, 2^520256404 is an apocalyptic number.

It is an amenable number.

520256404 is a deficient number, since it is larger than the sum of its proper divisors (478973996).

520256404 is a wasteful number, since it uses less digits than its factorization.

520256404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 520256404 is about 22809.1298387291. The cubic root of 520256404 is about 804.2773005343.

The spelling of 520256404 in words is "five hundred twenty million, two hundred fifty-six thousand, four hundred four".