138875020 has 12 divisors (see below), whose sum is σ = 291637584. Its totient is φ = 55550000.

The previous prime is 138875017. The next prime is 138875021. The reversal of 138875020 is 20578831.

It is not an unprimeable number, because it can be changed into a prime (138875021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3471856 + ... + 3471895.

It is an arithmetic number, because the mean of its divisors is an integer number (24303132).

Almost surely, 2^138875020 is an apocalyptic number.

138875020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138875020 is an abundant number, since it is smaller than the sum of its proper divisors (152762564).

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

138875020 is a wasteful number, since it uses less digits than its factorization.

138875020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6943760 (or 6943758 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 138875020 is about 11784.5245979632. The cubic root of 138875020 is about 517.8548462069.

The spelling of 138875020 in words is "one hundred thirty-eight million, eight hundred seventy-five thousand, twenty".