313566640 has 20 divisors (see below), whose sum is σ = 729042624. Its totient is φ = 125426624.

The previous prime is 313566637. The next prime is 313566641. The reversal of 313566640 is 46665313.

313566640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 313566596 and 313566605.

It is not an unprimeable number, because it can be changed into a prime (313566641) 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, 1959712 + ... + 1959871.

Almost surely, 2^313566640 is an apocalyptic number.

It is an amenable number.

313566640 is an abundant number, since it is smaller than the sum of its proper divisors (415475984).

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

313566640 is a wasteful number, since it uses less digits than its factorization.

313566640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919596 (or 3919590 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 313566640 is about 17707.8129649034. The cubic root of 313566640 is about 679.3756090836.

The spelling of 313566640 in words is "three hundred thirteen million, five hundred sixty-six thousand, six hundred forty".