138339276 has 12 divisors (see below), whose sum is σ = 322791672. Its totient is φ = 46113088.

The previous prime is 138339259. The next prime is 138339281. The reversal of 138339276 is 672933831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5764125 + ... + 5764148.

It is an arithmetic number, because the mean of its divisors is an integer number (26899306).

Almost surely, 2^138339276 is an apocalyptic number.

It is an amenable number.

138339276 is an abundant number, since it is smaller than the sum of its proper divisors (184452396).

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

138339276 is a wasteful number, since it uses less digits than its factorization.

138339276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11528280 (or 11528278 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 138339276 is about 11761.7718053021. The cubic root of 138339276 is about 517.1880712553.

The spelling of 138339276 in words is "one hundred thirty-eight million, three hundred thirty-nine thousand, two hundred seventy-six".