520520812 has 12 divisors (see below), whose sum is σ = 1041041680. Its totient is φ = 223080336.

The previous prime is 520520779. The next prime is 520520813. The reversal of 520520812 is 218025025.

520520812 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (520520813) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9294987 + ... + 9295042.

Almost surely, 2^520520812 is an apocalyptic number.

It is an amenable number.

520520812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

520520812 is a wasteful number, since it uses less digits than its factorization.

520520812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18590040 (or 18590038 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 520520812 is about 22814.9252025949. The cubic root of 520520812 is about 804.4135290907.

Adding to 520520812 its reverse (218025025), we get a palindrome (738545837).

The spelling of 520520812 in words is "five hundred twenty million, five hundred twenty thousand, eight hundred twelve".