639108832 has 12 divisors (see below), whose sum is σ = 1258245576. Its totient is φ = 319554400.

The previous prime is 639108817. The next prime is 639108851. The reversal of 639108832 is 238801936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986044 + ... + 9986107.

It is an arithmetic number, because the mean of its divisors is an integer number (104853798).

Almost surely, 2^639108832 is an apocalyptic number.

It is an amenable number.

639108832 is a deficient number, since it is larger than the sum of its proper divisors (619136744).

639108832 is a wasteful number, since it uses less digits than its factorization.

639108832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19972161 (or 19972153 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 639108832 is about 25280.6018915690. The cubic root of 639108832 is about 861.3736978680.

The spelling of 639108832 in words is "six hundred thirty-nine million, one hundred eight thousand, eight hundred thirty-two".