138079908 has 36 divisors (see below), whose sum is σ = 351191568. Its totient is φ = 45742320.

The previous prime is 138079891. The next prime is 138079951. The reversal of 138079908 is 809970831.

138079908 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5898 + ... + 17633.

Almost surely, 2^138079908 is an apocalyptic number.

138079908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138079908 is an abundant number, since it is smaller than the sum of its proper divisors (213111660).

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

138079908 is a wasteful number, since it uses less digits than its factorization.

138079908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23704 (or 23699 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 138079908 is about 11750.7407426085. The cubic root of 138079908 is about 516.8646491106.

The spelling of 138079908 in words is "one hundred thirty-eight million, seventy-nine thousand, nine hundred eight".