138385975 has 48 divisors (see below), whose sum is σ = 214986240. Its totient is φ = 86025600.

The previous prime is 138385969. The next prime is 138385991. The reversal of 138385975 is 579583831.

It is not a de Polignac number, because 138385975 - 2⁹ = 138385463 is a prime.

Its product of digits (907200) is a multiple of the sum of its prime factors (1120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133710 + ... + 134740.

It is an arithmetic number, because the mean of its divisors is an integer number (4478880).

Almost surely, 2^138385975 is an apocalyptic number.

138385975 is a deficient number, since it is larger than the sum of its proper divisors (76600265).

138385975 is a wasteful number, since it uses less digits than its factorization.

138385975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1115 counting only the distinct ones).

The product of its digits is 907200, while the sum is 49.

The square root of 138385975 is about 11763.7568403975. The cubic root of 138385975 is about 517.2462601979.

The spelling of 138385975 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, nine hundred seventy-five".