138575688 has 32 divisors (see below), whose sum is σ = 358387200. Its totient is φ = 44598848.

The previous prime is 138575677. The next prime is 138575711. The reversal of 138575688 is 886575831.

It is a self number, because there is not a number n which added to its sum of digits gives 138575688.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98856 + ... + 100247.

It is an arithmetic number, because the mean of its divisors is an integer number (11199600).

Almost surely, 2^138575688 is an apocalyptic number.

It is an amenable number.

138575688 is an abundant number, since it is smaller than the sum of its proper divisors (219811512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138575688 is a wasteful number, since it uses less digits than its factorization.

138575688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199141 (or 199137 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 51.

The square root of 138575688 is about 11771.8175317153. The cubic root of 138575688 is about 517.4825161542.

The spelling of 138575688 in words is "one hundred thirty-eight million, five hundred seventy-five thousand, six hundred eighty-eight".