138932572 has 12 divisors (see below), whose sum is σ = 243311040. Its totient is φ = 69415136.

The previous prime is 138932537. The next prime is 138932593. The reversal of 138932572 is 275239831.

138932572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6313 + ... + 17824.

It is an arithmetic number, because the mean of its divisors is an integer number (20275920).

Almost surely, 2^138932572 is an apocalyptic number.

It is an amenable number.

138932572 is a deficient number, since it is larger than the sum of its proper divisors (104378468).

138932572 is a wasteful number, since it uses less digits than its factorization.

138932572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25580 (or 25578 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 138932572 is about 11786.9661915185. The cubic root of 138932572 is about 517.9263720677.

The spelling of 138932572 in words is "one hundred thirty-eight million, nine hundred thirty-two thousand, five hundred seventy-two".