138184 has 16 divisors (see below), whose sum is σ = 270720. Its totient is φ = 66000.

The previous prime is 138181. The next prime is 138191. The reversal of 138184 is 481831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138181) 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, 192 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (16920).

2¹³⁸¹⁸⁴ is an apocalyptic number.

It is an amenable number.

138184 is a deficient number, since it is larger than the sum of its proper divisors (132536).

138184 is a wasteful number, since it uses less digits than its factorization.

138184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 776 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 138184 is about 371.7310855982. The cubic root of 138184 is about 51.6994496535.

The spelling of 138184 in words is "one hundred thirty-eight thousand, one hundred eighty-four".