138865596 has 12 divisors (see below), whose sum is σ = 324019752. Its totient is φ = 46288528.

The previous prime is 138865591. The next prime is 138865603. The reversal of 138865596 is 695568831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138865591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5786055 + ... + 5786078.

It is an arithmetic number, because the mean of its divisors is an integer number (27001646).

Almost surely, 2^138865596 is an apocalyptic number.

It is an amenable number.

138865596 is an abundant number, since it is smaller than the sum of its proper divisors (185154156).

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

138865596 is a wasteful number, since it uses less digits than its factorization.

138865596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11572140 (or 11572138 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 138865596 is about 11784.1247447572. The cubic root of 138865596 is about 517.8431321385.

The spelling of 138865596 in words is "one hundred thirty-eight million, eight hundred sixty-five thousand, five hundred ninety-six".