520333664 has 24 divisors (see below), whose sum is σ = 1052095968. Its totient is φ = 253134720.

The previous prime is 520333661. The next prime is 520333717. The reversal of 520333664 is 466333025.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 520333664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520333661) 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, 218552 + ... + 220919.

It is an arithmetic number, because the mean of its divisors is an integer number (43837332).

Almost surely, 2^520333664 is an apocalyptic number.

It is an amenable number.

520333664 is an abundant number, since it is smaller than the sum of its proper divisors (531762304).

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

520333664 is a wasteful number, since it uses less digits than its factorization.

520333664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439518 (or 439510 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 520333664 is about 22810.8233959233. The cubic root of 520333664 is about 804.3171112815.

Adding to 520333664 its reverse (466333025), we get a palindrome (986666689).

The spelling of 520333664 in words is "five hundred twenty million, three hundred thirty-three thousand, six hundred sixty-four".