138844832 has 72 divisors (see below), whose sum is σ = 322601076. Its totient is φ = 58641408.

The previous prime is 138844829. The next prime is 138844841. The reversal of 138844832 is 238448831.

It can be written as a sum of positive squares in 2 ways, for example, as 129868816 + 8976016 = 11396^2 + 2996^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138844832.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113858 + ... + 115070.

Almost surely, 2^138844832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138844832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161300538).

138844832 is an abundant number, since it is smaller than the sum of its proper divisors (183756244).

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

138844832 is a wasteful number, since it uses less digits than its factorization.

138844832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1295 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 138844832 is about 11783.2436960287. The cubic root of 138844832 is about 517.8173205358.

The spelling of 138844832 in words is "one hundred thirty-eight million, eight hundred forty-four thousand, eight hundred thirty-two".