520511920 has 20 divisors (see below), whose sum is σ = 1210190400. Its totient is φ = 208204736.

The previous prime is 520511903. The next prime is 520511941. The reversal of 520511920 is 29115025.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 3253120 + ... + 3253279.

It is an arithmetic number, because the mean of its divisors is an integer number (60509520).

Almost surely, 2^520511920 is an apocalyptic number.

It is an amenable number.

520511920 is an abundant number, since it is smaller than the sum of its proper divisors (689678480).

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

520511920 is a wasteful number, since it uses less digits than its factorization.

520511920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506412 (or 6506406 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 520511920 is about 22814.7303293289. The cubic root of 520511920 is about 804.4089484952.

Adding to 520511920 its reverse (29115025), we get a palindrome (549626945).

The spelling of 520511920 in words is "five hundred twenty million, five hundred eleven thousand, nine hundred twenty".