138898935 has 32 divisors (see below), whose sum is σ = 282209280. Its totient is φ = 63496224.

The previous prime is 138898927. The next prime is 138899017. The reversal of 138898935 is 539898831.

It is not a de Polignac number, because 138898935 - 2³ = 138898927 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 72547 + ... + 74436.

It is an arithmetic number, because the mean of its divisors is an integer number (8819040).

Almost surely, 2^138898935 is an apocalyptic number.

138898935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138898935 is an abundant number, since it is smaller than the sum of its proper divisors (143310345).

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

138898935 is a wasteful number, since it uses less digits than its factorization.

138898935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147004 (or 146998 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 138898935 is about 11785.5392324662. The cubic root of 138898935 is about 517.8845702658.

The spelling of 138898935 in words is "one hundred thirty-eight million, eight hundred ninety-eight thousand, nine hundred thirty-five".