138884185 has 16 divisors (see below), whose sum is σ = 187679232. Its totient is φ = 97747200.

The previous prime is 138884183. The next prime is 138884267. The reversal of 138884185 is 581488831.

It is not a de Polignac number, because 138884185 - 2¹ = 138884183 is a prime.

It is a super-2 number, since 2×138884185² = 38577633686228450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138884183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39024 + ... + 42433.

It is an arithmetic number, because the mean of its divisors is an integer number (11729952).

Almost surely, 2^138884185 is an apocalyptic number.

It is an amenable number.

138884185 is a deficient number, since it is larger than the sum of its proper divisors (48795047).

138884185 is a wasteful number, since it uses less digits than its factorization.

138884185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81504.

The product of its digits is 245760, while the sum is 46.

The square root of 138884185 is about 11784.9134489821. The cubic root of 138884185 is about 517.8662378291.

The spelling of 138884185 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, one hundred eighty-five".