638093164 has 12 divisors (see below), whose sum is σ = 1182349224. Its totient is φ = 300279104.

The previous prime is 638093161. The next prime is 638093171. The reversal of 638093164 is 461390836.

It is not an unprimeable number, because it can be changed into a prime (638093161) 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, 4691794 + ... + 4691929.

It is an arithmetic number, because the mean of its divisors is an integer number (98529102).

Almost surely, 2^638093164 is an apocalyptic number.

It is an amenable number.

638093164 is a deficient number, since it is larger than the sum of its proper divisors (544256060).

638093164 is a wasteful number, since it uses less digits than its factorization.

638093164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383744 (or 9383742 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 638093164 is about 25260.5060123506. The cubic root of 638093164 is about 860.9171592668.

The spelling of 638093164 in words is "six hundred thirty-eight million, ninety-three thousand, one hundred sixty-four".