640093708 has 24 divisors (see below), whose sum is σ = 1136340800. Its totient is φ = 315439488.

The previous prime is 640093687. The next prime is 640093721. The reversal of 640093708 is 807390046.

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, 222616 + ... + 225472.

Almost surely, 2^640093708 is an apocalyptic number.

It is an amenable number.

640093708 is a deficient number, since it is larger than the sum of its proper divisors (496247092).

640093708 is a wasteful number, since it uses less digits than its factorization.

640093708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 640093708 is about 25300.0732805263. The cubic root of 640093708 is about 861.8159339114.

The spelling of 640093708 in words is "six hundred forty million, ninety-three thousand, seven hundred eight".