63638938 has 16 divisors (see below), whose sum is σ = 104961024. Its totient is φ = 28697760.

The previous prime is 63638909. The next prime is 63638941. The reversal of 63638938 is 83983636.

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, 8595 + ... + 14182.

It is an arithmetic number, because the mean of its divisors is an integer number (6560064).

Almost surely, 2^63638938 is an apocalyptic number.

63638938 is a deficient number, since it is larger than the sum of its proper divisors (41322086).

63638938 is a wasteful number, since it uses less digits than its factorization.

63638938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22917.

The product of its digits is 559872, while the sum is 46.

The square root of 63638938 is about 7977.4017073230. The cubic root of 63638938 is about 399.2463684906.

The spelling of 63638938 in words is "sixty-three million, six hundred thirty-eight thousand, nine hundred thirty-eight".