138568912 has 20 divisors (see below), whose sum is σ = 269982720. Its totient is φ = 68895968.

The previous prime is 138568909. The next prime is 138568939. The reversal of 138568912 is 219865831.

It is a congruent number.

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, 21328 + ... + 27055.

It is an arithmetic number, because the mean of its divisors is an integer number (13499136).

Almost surely, 2^138568912 is an apocalyptic number.

It is an amenable number.

138568912 is a deficient number, since it is larger than the sum of its proper divisors (131413808).

138568912 is a wasteful number, since it uses less digits than its factorization.

138568912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48570 (or 48564 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 138568912 is about 11771.5297221729. The cubic root of 138568912 is about 517.4740814888.

The spelling of 138568912 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, nine hundred twelve".