108138 has 16 divisors (see below), whose sum is σ = 220320. Its totient is φ = 35376.

The previous prime is 108131. The next prime is 108139. The reversal of 108138 is 831801.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 108138.

It is not an unprimeable number, because it can be changed into a prime (108131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 536.

It is an arithmetic number, because the mean of its divisors is an integer number (13770).

2¹⁰⁸¹³⁸ is an apocalyptic number.

108138 is an abundant number, since it is smaller than the sum of its proper divisors (112182).

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

108138 is a wasteful number, since it uses less digits than its factorization.

108138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 108138 is about 328.8434277890. The cubic root of 108138 is about 47.6423063838.

Adding to 108138 its reverse (831801), we get a palindrome (939939).

The spelling of 108138 in words is "one hundred eight thousand, one hundred thirty-eight".