138188 has 12 divisors (see below), whose sum is σ = 244440. Its totient is φ = 68352.

The previous prime is 138181. The next prime is 138191. The reversal of 138188 is 881831.

It is a happy number.

138188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 138188.

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, 620 + ... + 812.

It is an arithmetic number, because the mean of its divisors is an integer number (20370).

2¹³⁸¹⁸⁸ is an apocalyptic number.

It is an amenable number.

138188 is a deficient number, since it is larger than the sum of its proper divisors (106252).

138188 is a wasteful number, since it uses less digits than its factorization.

138188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its digits is 1536, while the sum is 29.

The square root of 138188 is about 371.7364657926. The cubic root of 138188 is about 51.6999484951.

The spelling of 138188 in words is "one hundred thirty-eight thousand, one hundred eighty-eight".