138775164 has 48 divisors (see below), whose sum is σ = 371844480. Its totient is φ = 39839040.

The previous prime is 138775159. The next prime is 138775181. The reversal of 138775164 is 461577831.

It is a super-2 number, since 2×138775164² = 38517092286453792, which contains 22 as substring.

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, 25159 + ... + 30174.

It is an arithmetic number, because the mean of its divisors is an integer number (7746760).

Almost surely, 2^138775164 is an apocalyptic number.

It is an amenable number.

138775164 is an abundant number, since it is smaller than the sum of its proper divisors (233069316).

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

138775164 is a wasteful number, since it uses less digits than its factorization.

138775164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55370 (or 55368 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 138775164 is about 11780.2870932758. The cubic root of 138775164 is about 517.7306978600.

The spelling of 138775164 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, one hundred sixty-four".