138884186 has 32 divisors (see below), whose sum is σ = 265368960. Its totient is φ = 53070336.

The previous prime is 138884183. The next prime is 138884267. The reversal of 138884186 is 681488831.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138884186.

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, 10835 + ... + 19878.

It is an arithmetic number, because the mean of its divisors is an integer number (8292780).

Almost surely, 2^138884186 is an apocalyptic number.

138884186 is a deficient number, since it is larger than the sum of its proper divisors (126484774).

138884186 is a wasteful number, since it uses less digits than its factorization.

138884186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30758.

The product of its digits is 294912, while the sum is 47.

The square root of 138884186 is about 11784.9134914093. The cubic root of 138884186 is about 517.8662390720.

The spelling of 138884186 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, one hundred eighty-six".