138311836 has 24 divisors (see below), whose sum is σ = 261146480. Its totient is φ = 63718272.

The previous prime is 138311687. The next prime is 138311839. The reversal of 138311836 is 638113831.

138311836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138311839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30040 + ... + 34336.

Almost surely, 2^138311836 is an apocalyptic number.

It is an amenable number.

138311836 is a deficient number, since it is larger than the sum of its proper divisors (122834644).

138311836 is a wasteful number, since it uses less digits than its factorization.

138311836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933 (or 4931 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 138311836 is about 11760.6052565334. The cubic root of 138311836 is about 517.1538737386.

The spelling of 138311836 in words is "one hundred thirty-eight million, three hundred eleven thousand, eight hundred thirty-six".