520645204 has 48 divisors (see below), whose sum is σ = 999427968. Its totient is φ = 236573568.

The previous prime is 520645133. The next prime is 520645259. The reversal of 520645204 is 402546025.

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 15 ways as a sum of consecutive naturals, for example, 144594 + ... + 148150.

It is an arithmetic number, because the mean of its divisors is an integer number (20821416).

Almost surely, 2^520645204 is an apocalyptic number.

It is an amenable number.

520645204 is a deficient number, since it is larger than the sum of its proper divisors (478782764).

520645204 is a wasteful number, since it uses less digits than its factorization.

520645204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664 (or 3662 counting only the distinct ones).

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

The square root of 520645204 is about 22817.6511499322. The cubic root of 520645204 is about 804.4776025056.

The spelling of 520645204 in words is "five hundred twenty million, six hundred forty-five thousand, two hundred four".