520522704 has 180 divisors, whose sum is σ = 1604483244. Its totient is φ = 157427712.

The previous prime is 520522693. The next prime is 520522741. The reversal of 520522704 is 407225025.

It can be written as a sum of positive squares in 6 ways, for example, as 3415104 + 517107600 = 1848^2 + 22740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1776382 + ... + 1776674.

Almost surely, 2^520522704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520522704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802241622).

520522704 is an abundant number, since it is smaller than the sum of its proper divisors (1083960540).

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

520522704 is a wasteful number, since it uses less digits than its factorization.

520522704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 520522704 is about 22814.9666666423. The cubic root of 520522704 is about 804.4145037226.

Adding to 520522704 its reverse (407225025), we get a palindrome (927747729).

It can be divided in two parts, 52052 and 2704, that added together give a square (54756 = 234²).

The spelling of 520522704 in words is "five hundred twenty million, five hundred twenty-two thousand, seven hundred four".