138000888 has 32 divisors (see below), whose sum is σ = 383336400. Its totient is φ = 46000224.

The previous prime is 138000887. The next prime is 138000901. The reversal of 138000888 is 888000831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138000887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319231 + ... + 319662.

Almost surely, 2^138000888 is an apocalyptic number.

138000888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138000888 is an abundant number, since it is smaller than the sum of its proper divisors (245335512).

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

138000888 is a wasteful number, since it uses less digits than its factorization.

138000888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638908 (or 638898 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 138000888 is about 11747.3779201999. The cubic root of 138000888 is about 516.7660336573.

The spelling of 138000888 in words is "one hundred thirty-eight million, eight hundred eighty-eight", and thus it is an aban number.