138630688 has 48 divisors (see below), whose sum is σ = 328345920. Its totient is φ = 56284416.

The previous prime is 138630659. The next prime is 138630691. The reversal of 138630688 is 886036831.

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, 12031 + ... + 20542.

It is an arithmetic number, because the mean of its divisors is an integer number (6840540).

Almost surely, 2^138630688 is an apocalyptic number.

It is an amenable number.

138630688 is an abundant number, since it is smaller than the sum of its proper divisors (189715232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138630688 is a wasteful number, since it uses less digits than its factorization.

138630688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32609 (or 32601 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 138630688 is about 11774.1533878237. The cubic root of 138630688 is about 517.5509691760.

The spelling of 138630688 in words is "one hundred thirty-eight million, six hundred thirty thousand, six hundred eighty-eight".