138637524 has 12 divisors (see below), whose sum is σ = 323487584. Its totient is φ = 46212504.

The previous prime is 138637519. The next prime is 138637589. The reversal of 138637524 is 425736831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5776552 + ... + 5776575.

Almost surely, 2^138637524 is an apocalyptic number.

It is an amenable number.

138637524 is an abundant number, since it is smaller than the sum of its proper divisors (184850060).

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

138637524 is a wasteful number, since it uses less digits than its factorization.

138637524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11553134 (or 11553132 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 138637524 is about 11774.4436811257. The cubic root of 138637524 is about 517.5594759993.

The spelling of 138637524 in words is "one hundred thirty-eight million, six hundred thirty-seven thousand, five hundred twenty-four".