138905295 has 16 divisors (see below), whose sum is σ = 233946240. Its totient is φ = 70183584.

The previous prime is 138905281. The next prime is 138905339. The reversal of 138905295 is 592509831.

138905295 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138905295 - 2⁹ = 138904783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243409 + ... + 243978.

It is an arithmetic number, because the mean of its divisors is an integer number (14621640).

Almost surely, 2^138905295 is an apocalyptic number.

138905295 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138905295 is a deficient number, since it is larger than the sum of its proper divisors (95040945).

138905295 is a wasteful number, since it uses less digits than its factorization.

138905295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487414.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 138905295 is about 11785.8090515671. The cubic root of 138905295 is about 517.8924745635.

The spelling of 138905295 in words is "one hundred thirty-eight million, nine hundred five thousand, two hundred ninety-five".