138872904 has 32 divisors (see below), whose sum is σ = 355652640. Its totient is φ = 45161600.

The previous prime is 138872897. The next prime is 138872939. The reversal of 138872904 is 409278831.

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, 69582 + ... + 71549.

It is an arithmetic number, because the mean of its divisors is an integer number (11114145).

Almost surely, 2^138872904 is an apocalyptic number.

It is an amenable number.

138872904 is an abundant number, since it is smaller than the sum of its proper divisors (216779736).

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

138872904 is a wasteful number, since it uses less digits than its factorization.

138872904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141181 (or 141177 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 138872904 is about 11784.4348188617. The cubic root of 138872904 is about 517.8522160569.

The spelling of 138872904 in words is "one hundred thirty-eight million, eight hundred seventy-two thousand, nine hundred four".