138838 has 16 divisors (see below), whose sum is σ = 244224. Its totient is φ = 57960.

The previous prime is 138829. The next prime is 138841. The reversal of 138838 is 838831.

138838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

138838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (15264).

2¹³⁸⁸³⁸ is an apocalyptic number.

138838 is a deficient number, since it is larger than the sum of its proper divisors (105386).

138838 is a wasteful number, since it uses less digits than its factorization.

138838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267.

The product of its digits is 4608, while the sum is 31.

The square root of 138838 is about 372.6097153860. The cubic root of 138838 is about 51.7808827155.

The spelling of 138838 in words is "one hundred thirty-eight thousand, eight hundred thirty-eight".