138192886 has 16 divisors (see below), whose sum is σ = 223436304. Its totient is φ = 63723744.

The previous prime is 138192863. The next prime is 138192913. The reversal of 138192886 is 688291831.

It is a congruent number.

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, 43525 + ... + 46591.

It is an arithmetic number, because the mean of its divisors is an integer number (13964769).

Almost surely, 2^138192886 is an apocalyptic number.

138192886 is a deficient number, since it is larger than the sum of its proper divisors (85243418).

138192886 is a wasteful number, since it uses less digits than its factorization.

138192886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its digits is 165888, while the sum is 46.

The square root of 138192886 is about 11755.5470310828. The cubic root of 138192886 is about 517.0055781716.

The spelling of 138192886 in words is "one hundred thirty-eight million, one hundred ninety-two thousand, eight hundred eighty-six".