138898936 has 16 divisors (see below), whose sum is σ = 284111640. Its totient is φ = 63135840.

The previous prime is 138898927. The next prime is 138899017. The reversal of 138898936 is 639898831.

It is a happy number.

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, 789111 + ... + 789286.

Almost surely, 2^138898936 is an apocalyptic number.

It is an amenable number.

138898936 is an abundant number, since it is smaller than the sum of its proper divisors (145212704).

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

138898936 is a wasteful number, since it uses less digits than its factorization.

138898936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578414 (or 1578410 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 55.

The square root of 138898936 is about 11785.5392748911. The cubic root of 138898936 is about 517.8845715086.

The spelling of 138898936 in words is "one hundred thirty-eight million, eight hundred ninety-eight thousand, nine hundred thirty-six".