138088775 has 12 divisors (see below), whose sum is σ = 186796824. Its totient is φ = 100428000.

The previous prime is 138088763. The next prime is 138088799. The reversal of 138088775 is 577880831.

It is not a de Polignac number, because 138088775 - 2⁴ = 138088759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250796 + ... + 251345.

It is an arithmetic number, because the mean of its divisors is an integer number (15566402).

Almost surely, 2^138088775 is an apocalyptic number.

138088775 is a deficient number, since it is larger than the sum of its proper divisors (48708049).

138088775 is a wasteful number, since it uses less digits than its factorization.

138088775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502162 (or 502157 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 47.

The square root of 138088775 is about 11751.1180319151. The cubic root of 138088775 is about 516.8757126095.

The spelling of 138088775 in words is "one hundred thirty-eight million, eighty-eight thousand, seven hundred seventy-five".