138530888 has 16 divisors (see below), whose sum is σ = 260087280. Its totient is φ = 69174288.

The previous prime is 138530857. The next prime is 138530891. The reversal of 138530888 is 888035831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706 + ... + 17297.

It is an arithmetic number, because the mean of its divisors is an integer number (16255455).

Almost surely, 2^138530888 is an apocalyptic number.

It is an amenable number.

138530888 is a deficient number, since it is larger than the sum of its proper divisors (121556392).

138530888 is a wasteful number, since it uses less digits than its factorization.

138530888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22796 (or 22792 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 138530888 is about 11769.9145281519. The cubic root of 138530888 is about 517.4267446698.

The spelling of 138530888 in words is "one hundred thirty-eight million, five hundred thirty thousand, eight hundred eighty-eight".