138628732 has 36 divisors (see below), whose sum is σ = 272902168. Its totient is φ = 61538400.

The previous prime is 138628717. The next prime is 138628741. The reversal of 138628732 is 237826831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17482 + ... + 24142.

Almost surely, 2^138628732 is an apocalyptic number.

It is an amenable number.

138628732 is a deficient number, since it is larger than the sum of its proper divisors (134273436).

138628732 is a wasteful number, since it uses less digits than its factorization.

138628732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6730 (or 6717 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 138628732 is about 11774.0703242337. The cubic root of 138628732 is about 517.5485350482.

The spelling of 138628732 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, seven hundred thirty-two".