318525640 has 16 divisors (see below), whose sum is σ = 716682780. Its totient is φ = 127410240.

The previous prime is 318525611. The next prime is 318525659. The reversal of 318525640 is 46525813.

It can be written as a sum of positive squares in 2 ways, for example, as 262245636 + 56280004 = 16194^2 + 7502^2 .

It is a junction number, because it is equal to n+sod(n) for n = 318525596 and 318525605.

It is an unprimeable number.

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, 3981531 + ... + 3981610.

Almost surely, 2^318525640 is an apocalyptic number.

It is an amenable number.

318525640 is an abundant number, since it is smaller than the sum of its proper divisors (398157140).

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

318525640 is a wasteful number, since it uses less digits than its factorization.

318525640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963152 (or 7963148 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 318525640 is about 17847.2866285046. The cubic root of 318525640 is about 682.9382945068.

The spelling of 318525640 in words is "three hundred eighteen million, five hundred twenty-five thousand, six hundred forty".