138137244 has 24 divisors (see below), whose sum is σ = 368366208. Its totient is φ = 39467760.

The previous prime is 138137221. The next prime is 138137297. The reversal of 138137244 is 442731831.

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, 822162 + ... + 822329.

It is an arithmetic number, because the mean of its divisors is an integer number (15348592).

Almost surely, 2^138137244 is an apocalyptic number.

138137244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138137244 is an abundant number, since it is smaller than the sum of its proper divisors (230228964).

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

138137244 is a wasteful number, since it uses less digits than its factorization.

138137244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644505 (or 1644503 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 138137244 is about 11753.1801653850. The cubic root of 138137244 is about 516.9361797942.

The spelling of 138137244 in words is "one hundred thirty-eight million, one hundred thirty-seven thousand, two hundred forty-four".