138557004 has 36 divisors (see below), whose sum is σ = 343444584. Its totient is φ = 43467776.

The previous prime is 138556981. The next prime is 138557017. The reversal of 138557004 is 400755831.

138557004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16509 + ... + 23444.

Almost surely, 2^138557004 is an apocalyptic number.

It is an amenable number.

138557004 is an abundant number, since it is smaller than the sum of its proper divisors (204887580).

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

138557004 is a wasteful number, since it uses less digits than its factorization.

138557004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39994 (or 39975 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 138557004 is about 11771.0239146813. The cubic root of 138557004 is about 517.4592579188.

The spelling of 138557004 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, four".