138880475 has 6 divisors (see below), whose sum is σ = 172211820. Its totient is φ = 111104360.

The previous prime is 138880453. The next prime is 138880477. The reversal of 138880475 is 574088831.

138880475 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 138880475 - 2⁸ = 138880219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138880477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2777585 + ... + 2777634.

It is an arithmetic number, because the mean of its divisors is an integer number (28701970).

Almost surely, 2^138880475 is an apocalyptic number.

138880475 is a deficient number, since it is larger than the sum of its proper divisors (33331345).

138880475 is an equidigital number, since it uses as much as digits as its factorization.

138880475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555229 (or 5555224 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 138880475 is about 11784.7560432959. The cubic root of 138880475 is about 517.8616265508.

The spelling of 138880475 in words is "one hundred thirty-eight million, eight hundred eighty thousand, four hundred seventy-five".