520280556 has 12 divisors (see below), whose sum is σ = 1213987992. Its totient is φ = 173426848.

The previous prime is 520280543. The next prime is 520280557. The reversal of 520280556 is 655082025.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (520280557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21678345 + ... + 21678368.

It is an arithmetic number, because the mean of its divisors is an integer number (101165666).

Almost surely, 2^520280556 is an apocalyptic number.

It is an amenable number.

520280556 is an abundant number, since it is smaller than the sum of its proper divisors (693707436).

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

520280556 is a wasteful number, since it uses less digits than its factorization.

520280556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43356720 (or 43356718 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 520280556 is about 22809.6592697041. The cubic root of 520280556 is about 804.2897460673.

It can be divided in two parts, 5202 and 80556, that added together give a palindrome (85758).

The spelling of 520280556 in words is "five hundred twenty million, two hundred eighty thousand, five hundred fifty-six".