520803812 has 24 divisors (see below), whose sum is σ = 974236032. Its totient is φ = 243003200.

The previous prime is 520803809. The next prime is 520803817. The reversal of 520803812 is 218308025.

It is a super-2 number, since 2×520803812² = 542473221187462688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520803817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65264 + ... + 72807.

It is an arithmetic number, because the mean of its divisors is an integer number (40593168).

Almost surely, 2^520803812 is an apocalyptic number.

It is an amenable number.

520803812 is a deficient number, since it is larger than the sum of its proper divisors (453432220).

520803812 is a wasteful number, since it uses less digits than its factorization.

520803812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138139 (or 138137 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 520803812 is about 22821.1264402089. The cubic root of 520803812 is about 804.5592855327.

The spelling of 520803812 in words is "five hundred twenty million, eight hundred three thousand, eight hundred twelve".