138379512 has 32 divisors (see below), whose sum is σ = 346682880. Its totient is φ = 46028640.

The previous prime is 138379487. The next prime is 138379517. The reversal of 138379512 is 215973831.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138379517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5913 + ... + 17655.

It is an arithmetic number, because the mean of its divisors is an integer number (10833840).

Almost surely, 2^138379512 is an apocalyptic number.

138379512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138379512 is an abundant number, since it is smaller than the sum of its proper divisors (208303368).

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

138379512 is a wasteful number, since it uses less digits than its factorization.

138379512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243 (or 12239 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 138379512 is about 11763.4821375305. The cubic root of 138379512 is about 517.2382078052.

The spelling of 138379512 in words is "one hundred thirty-eight million, three hundred seventy-nine thousand, five hundred twelve".