138539588 has 12 divisors (see below), whose sum is σ = 264484752. Its totient is φ = 62972520.

The previous prime is 138539563. The next prime is 138539617. The reversal of 138539588 is 885935831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574270 + ... + 1574357.

It is an arithmetic number, because the mean of its divisors is an integer number (22040396).

Almost surely, 2^138539588 is an apocalyptic number.

It is an amenable number.

138539588 is a deficient number, since it is larger than the sum of its proper divisors (125945164).

138539588 is a wasteful number, since it uses less digits than its factorization.

138539588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148642 (or 3148640 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 50.

The square root of 138539588 is about 11770.2841087206. The cubic root of 138539588 is about 517.4375762335.

The spelling of 138539588 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, five hundred eighty-eight".