138505076 has 6 divisors (see below), whose sum is σ = 242383890. Its totient is φ = 69252536.

The previous prime is 138504983. The next prime is 138505109. The reversal of 138505076 is 670505831.

It can be written as a sum of positive squares in only one way, i.e., 127148176 + 11356900 = 11276^2 + 3370^2 .

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, 17313131 + ... + 17313138.

It is an arithmetic number, because the mean of its divisors is an integer number (40397315).

Almost surely, 2^138505076 is an apocalyptic number.

It is an amenable number.

138505076 is a deficient number, since it is larger than the sum of its proper divisors (103878814).

138505076 is a wasteful number, since it uses less digits than its factorization.

138505076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34626273 (or 34626271 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 138505076 is about 11768.8179525388. The cubic root of 138505076 is about 517.3946058716.

The spelling of 138505076 in words is "one hundred thirty-eight million, five hundred five thousand, seventy-six".