138638892308 has 24 divisors (see below), whose sum is σ = 277551560832. Its totient is φ = 59358001824.

The previous prime is 138638892263. The next prime is 138638892319. The reversal of 138638892308 is 803298836831.

It is a congruent number.

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, 2415560 + ... + 2472287.

It is an arithmetic number, because the mean of its divisors is an integer number (11564648368).

Almost surely, 2^138638892308 is an apocalyptic number.

It is an amenable number.

138638892308 is an abundant number, since it is smaller than the sum of its proper divisors (138912668524).

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

138638892308 is a wasteful number, since it uses less digits than its factorization.

138638892308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888871 (or 4888869 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 138638892308 in words is "one hundred thirty-eight billion, six hundred thirty-eight million, eight hundred ninety-two thousand, three hundred eight".