520343558728 has 32 divisors (see below), whose sum is σ = 1150990364160. Its totient is φ = 215810691840.

The previous prime is 520343558719. The next prime is 520343558737. The reversal of 520343558728 is 827855343025.

It is an interprime number because it is at equal distance from previous prime (520343558719) and next prime (520343558737).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149866801 + ... + 149870272.

It is an arithmetic number, because the mean of its divisors is an integer number (35968448880).

Almost surely, 2^520343558728 is an apocalyptic number.

It is an amenable number.

520343558728 is an abundant number, since it is smaller than the sum of its proper divisors (630646805432).

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

520343558728 is a wasteful number, since it uses less digits than its factorization.

520343558728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299737117 (or 299737113 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 52.

The spelling of 520343558728 in words is "five hundred twenty billion, three hundred forty-three million, five hundred fifty-eight thousand, seven hundred twenty-eight".