138727824 has 40 divisors (see below), whose sum is σ = 359456160. Its totient is φ = 46103808.

The previous prime is 138727817. The next prime is 138727859. The reversal of 138727824 is 428727831.

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, 12492 + ... + 20820.

It is an arithmetic number, because the mean of its divisors is an integer number (8986404).

Almost surely, 2^138727824 is an apocalyptic number.

It is an amenable number.

138727824 is an abundant number, since it is smaller than the sum of its proper divisors (220728336).

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

138727824 is a wasteful number, since it uses less digits than its factorization.

138727824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8687 (or 8681 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 138727824 is about 11778.2776329988. The cubic root of 138727824 is about 517.6718204692.

The spelling of 138727824 in words is "one hundred thirty-eight million, seven hundred twenty-seven thousand, eight hundred twenty-four".