138900892 has 12 divisors (see below), whose sum is σ = 261774856. Its totient is φ = 64108080.

The previous prime is 138900877. The next prime is 138900901. The reversal of 138900892 is 298009831.

138900892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1335534 + ... + 1335637.

Almost surely, 2^138900892 is an apocalyptic number.

It is an amenable number.

138900892 is a deficient number, since it is larger than the sum of its proper divisors (122873964).

138900892 is a wasteful number, since it uses less digits than its factorization.

138900892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671188 (or 2671186 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 138900892 is about 11785.6222576494. The cubic root of 138900892 is about 517.8870024787.

The spelling of 138900892 in words is "one hundred thirty-eight million, nine hundred thousand, eight hundred ninety-two".