138255902 has 16 divisors (see below), whose sum is σ = 214416672. Its totient is φ = 66808800.

The previous prime is 138255881. The next prime is 138255919. The reversal of 138255902 is 209552831.

138255902 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138255902² = 38229388875667208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4988 + ... + 17360.

It is an arithmetic number, because the mean of its divisors is an integer number (13401042).

Almost surely, 2^138255902 is an apocalyptic number.

138255902 is a deficient number, since it is larger than the sum of its proper divisors (76160770).

138255902 is a wasteful number, since it uses less digits than its factorization.

138255902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12563.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 138255902 is about 11758.2269921957. The cubic root of 138255902 is about 517.0841511325.

The spelling of 138255902 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, nine hundred two".