138581084 has 12 divisors (see below), whose sum is σ = 243873000. Its totient is φ = 68903088.

The previous prime is 138581077. The next prime is 138581123. The reversal of 138581084 is 480185831.

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, 96059 + ... + 97490.

It is an arithmetic number, because the mean of its divisors is an integer number (20322750).

Almost surely, 2^138581084 is an apocalyptic number.

It is an amenable number.

138581084 is a deficient number, since it is larger than the sum of its proper divisors (105291916).

138581084 is a wasteful number, since it uses less digits than its factorization.

138581084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193732 (or 193730 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 138581084 is about 11772.0467209402. The cubic root of 138581084 is about 517.4892328191.

The spelling of 138581084 in words is "one hundred thirty-eight million, five hundred eighty-one thousand, eighty-four".