638596424 has 16 divisors (see below), whose sum is σ = 1198696320. Its totient is φ = 318944080.

The previous prime is 638596369. The next prime is 638596433. The reversal of 638596424 is 424695836.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36524 + ... + 51099.

It is an arithmetic number, because the mean of its divisors is an integer number (74918520).

Almost surely, 2^638596424 is an apocalyptic number.

It is an amenable number.

638596424 is a deficient number, since it is larger than the sum of its proper divisors (560099896).

638596424 is a wasteful number, since it uses less digits than its factorization.

638596424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88540 (or 88536 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 638596424 is about 25270.4654488199. The cubic root of 638596424 is about 861.1434330773.

The spelling of 638596424 in words is "six hundred thirty-eight million, five hundred ninety-six thousand, four hundred twenty-four".