138110868 has 36 divisors (see below), whose sum is σ = 398987680. Its totient is φ = 39460176.

The previous prime is 138110857. The next prime is 138110887. The reversal of 138110868 is 868011831.

138110868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×138110868² = 38149223719426848, which contains 22 as substring.

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

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, 273778 + ... + 274281.

Almost surely, 2^138110868 is an apocalyptic number.

138110868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138110868 is an abundant number, since it is smaller than the sum of its proper divisors (260876812).

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

138110868 is a wasteful number, since it uses less digits than its factorization.

138110868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548076 (or 548071 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 138110868 is about 11752.0580325320. The cubic root of 138110868 is about 516.9032763421.

The spelling of 138110868 in words is "one hundred thirty-eight million, one hundred ten thousand, eight hundred sixty-eight".