138913902 has 48 divisors (see below), whose sum is σ = 335471760. Its totient is φ = 41285376.

The previous prime is 138913889. The next prime is 138913913. The reversal of 138913902 is 209319831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6133 + ... + 17760.

It is an arithmetic number, because the mean of its divisors is an integer number (6988995).

Almost surely, 2^138913902 is an apocalyptic number.

138913902 is an abundant number, since it is smaller than the sum of its proper divisors (196557858).

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

138913902 is a wasteful number, since it uses less digits than its factorization.

138913902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23937 (or 23934 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 138913902 is about 11786.1741884294. The cubic root of 138913902 is about 517.9031710803.

The spelling of 138913902 in words is "one hundred thirty-eight million, nine hundred thirteen thousand, nine hundred two".