518685072 has 20 divisors (see below), whose sum is σ = 1339936560. Its totient is φ = 172895008.

The previous prime is 518685023. The next prime is 518685073. The reversal of 518685072 is 270586815.

It is not an unprimeable number, because it can be changed into a prime (518685073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5402922 + ... + 5403017.

It is an arithmetic number, because the mean of its divisors is an integer number (66996828).

Almost surely, 2^518685072 is an apocalyptic number.

It is an amenable number.

518685072 is an abundant number, since it is smaller than the sum of its proper divisors (821251488).

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

518685072 is a wasteful number, since it uses less digits than its factorization.

518685072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805950 (or 10805944 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 518685072 is about 22774.6585484832. The cubic root of 518685072 is about 803.4667635707.

The spelling of 518685072 in words is "five hundred eighteen million, six hundred eighty-five thousand, seventy-two".