138395256 has 16 divisors (see below), whose sum is σ = 345988200. Its totient is φ = 46131744.

The previous prime is 138395237. The next prime is 138395269. The reversal of 138395256 is 652593831.

138395256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2883211 + ... + 2883258.

Almost surely, 2^138395256 is an apocalyptic number.

It is an amenable number.

138395256 is an abundant number, since it is smaller than the sum of its proper divisors (207592944).

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

138395256 is a wasteful number, since it uses less digits than its factorization.

138395256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766478 (or 5766474 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 138395256 is about 11764.1513081055. The cubic root of 138395256 is about 517.2578231597.

The spelling of 138395256 in words is "one hundred thirty-eight million, three hundred ninety-five thousand, two hundred fifty-six".