520748680 has 16 divisors (see below), whose sum is σ = 1171684620. Its totient is φ = 208299456.

The previous prime is 520748677. The next prime is 520748689. The reversal of 520748680 is 86847025.

It can be written as a sum of positive squares in 2 ways, for example, as 509766084 + 10982596 = 22578^2 + 3314^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 13018717 = 520748680 / (5 + 2 + 0 + 7 + 4 + 8 + 6 + 8 + 0).

It is not an unprimeable number, because it can be changed into a prime (520748689) 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, 6509319 + ... + 6509398.

Almost surely, 2^520748680 is an apocalyptic number.

It is an amenable number.

520748680 is an abundant number, since it is smaller than the sum of its proper divisors (650935940).

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

520748680 is a wasteful number, since it uses less digits than its factorization.

520748680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13018728 (or 13018724 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 520748680 is about 22819.9184924048. The cubic root of 520748680 is about 804.5308944657.

The spelling of 520748680 in words is "five hundred twenty million, seven hundred forty-eight thousand, six hundred eighty".