138140 has 12 divisors (see below), whose sum is σ = 290136. Its totient is φ = 55248.

The previous prime is 138139. The next prime is 138143. The reversal of 138140 is 41831.

It is a happy number.

138140 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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138140.

It is not an unprimeable number, because it can be changed into a prime (138143) 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, 3434 + ... + 3473.

It is an arithmetic number, because the mean of its divisors is an integer number (24178).

2¹³⁸¹⁴⁰ is an apocalyptic number.

138140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138140 is an abundant number, since it is smaller than the sum of its proper divisors (151996).

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

138140 is a wasteful number, since it uses less digits than its factorization.

138140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916 (or 6914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 138140 is about 371.6718983189. The cubic root of 138140 is about 51.6939617599.

Adding to 138140 its reverse (41831), we get a palindrome (179971).

The spelling of 138140 in words is "one hundred thirty-eight thousand, one hundred forty".