138137268 has 24 divisors (see below), whose sum is σ = 322902720. Its totient is φ = 45962560.

The previous prime is 138137221. The next prime is 138137297. The reversal of 138137268 is 862731831.

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, 3288 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (13454280).

Almost surely, 2^138137268 is an apocalyptic number.

It is an amenable number.

138137268 is an abundant number, since it is smaller than the sum of its proper divisors (184765452).

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

138137268 is a wasteful number, since it uses less digits than its factorization.

138137268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807 (or 20805 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 138137268 is about 11753.1811863852. The cubic root of 138137268 is about 516.9362097317.

The spelling of 138137268 in words is "one hundred thirty-eight million, one hundred thirty-seven thousand, two hundred sixty-eight".