138956132 has 12 divisors (see below), whose sum is σ = 277912320. Its totient is φ = 59552616.

The previous prime is 138956047. The next prime is 138956137. The reversal of 138956132 is 231659831.

It is a happy number.

138956132 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138956137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2481332 + ... + 2481387.

It is an arithmetic number, because the mean of its divisors is an integer number (23159360).

Almost surely, 2^138956132 is an apocalyptic number.

It is an amenable number.

138956132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138956132 is a wasteful number, since it uses less digits than its factorization.

138956132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962730 (or 4962728 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 138956132 is about 11787.9655581445. The cubic root of 138956132 is about 517.9556468337.

The spelling of 138956132 in words is "one hundred thirty-eight million, nine hundred fifty-six thousand, one hundred thirty-two".