138116788 has 12 divisors (see below), whose sum is σ = 242770752. Its totient is φ = 68753720.

The previous prime is 138116779. The next prime is 138116791. The reversal of 138116788 is 887611831.

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, 75148 + ... + 76963.

It is an arithmetic number, because the mean of its divisors is an integer number (20230896).

Almost surely, 2^138116788 is an apocalyptic number.

It is an amenable number.

138116788 is a deficient number, since it is larger than the sum of its proper divisors (104653964).

138116788 is a wasteful number, since it uses less digits than its factorization.

138116788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152342 (or 152340 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 138116788 is about 11752.3099006110. The cubic root of 138116788 is about 516.9106617702.

It can be divided in two parts, 13 and 8116788, that added together give a square (8116801 = 2849²).

The spelling of 138116788 in words is "one hundred thirty-eight million, one hundred sixteen thousand, seven hundred eighty-eight".