138502612 has 6 divisors (see below), whose sum is σ = 242379578. Its totient is φ = 69251304.

The previous prime is 138502547. The next prime is 138502667. The reversal of 138502612 is 216205831.

It can be written as a sum of positive squares in only one way, i.e., 136749636 + 1752976 = 11694^2 + 1324^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17312823 + ... + 17312830.

Almost surely, 2^138502612 is an apocalyptic number.

It is an amenable number.

138502612 is a deficient number, since it is larger than the sum of its proper divisors (103876966).

138502612 is a wasteful number, since it uses less digits than its factorization.

138502612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34625657 (or 34625655 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 138502612 is about 11768.7132686628. The cubic root of 138502612 is about 517.3915377100.

The spelling of 138502612 in words is "one hundred thirty-eight million, five hundred two thousand, six hundred twelve".