520440252 has 24 divisors (see below), whose sum is σ = 1215244800. Its totient is φ = 173353776.

The previous prime is 520440233. The next prime is 520440253. The reversal of 520440252 is 252044025.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520440253) 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, 2199 + ... + 32337.

It is an arithmetic number, because the mean of its divisors is an integer number (50635200).

Almost surely, 2^520440252 is an apocalyptic number.

It is an amenable number.

520440252 is an abundant number, since it is smaller than the sum of its proper divisors (694804548).

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

520440252 is a wasteful number, since it uses less digits than its factorization.

520440252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31585 (or 31583 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 520440252 is about 22813.1596233402. The cubic root of 520440252 is about 804.3720277739.

Adding to 520440252 its reverse (252044025), we get a palindrome (772484277).

The spelling of 520440252 in words is "five hundred twenty million, four hundred forty thousand, two hundred fifty-two".