138279752 has 32 divisors (see below), whose sum is σ = 279720000. Its totient is φ = 63706944.

The previous prime is 138279737. The next prime is 138279763. The reversal of 138279752 is 257972831.

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, 91499 + ... + 92997.

It is an arithmetic number, because the mean of its divisors is an integer number (8741250).

Almost surely, 2^138279752 is an apocalyptic number.

It is an amenable number.

138279752 is an abundant number, since it is smaller than the sum of its proper divisors (141440248).

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

138279752 is a wasteful number, since it uses less digits than its factorization.

138279752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2401 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The square root of 138279752 is about 11759.2411319779. The cubic root of 138279752 is about 517.1138828299.

The spelling of 138279752 in words is "one hundred thirty-eight million, two hundred seventy-nine thousand, seven hundred fifty-two".