138538825 has 12 divisors (see below), whose sum is σ = 172657600. Its totient is φ = 110270160.

The previous prime is 138538801. The next prime is 138538853. The reversal of 138538825 is 528835831.

It is not a de Polignac number, because 138538825 - 2⁵ = 138538793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8949 + ... + 18898.

Almost surely, 2^138538825 is an apocalyptic number.

It is an amenable number.

138538825 is a deficient number, since it is larger than the sum of its proper divisors (34118775).

138538825 is a wasteful number, since it uses less digits than its factorization.

138538825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28056 (or 28051 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

The square root of 138538825 is about 11770.2516965441. The cubic root of 138538825 is about 517.4366263111.

The spelling of 138538825 in words is "one hundred thirty-eight million, five hundred thirty-eight thousand, eight hundred twenty-five".