138680 has 16 divisors (see below), whose sum is σ = 312120. Its totient is φ = 55456.

The previous prime is 138679. The next prime is 138683. The reversal of 138680 is 86831.

138680 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 not an unprimeable number, because it can be changed into a prime (138683) 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, 1694 + ... + 1773.

2¹³⁸⁶⁸⁰ is an apocalyptic number.

138680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138680 is an abundant number, since it is smaller than the sum of its proper divisors (173440).

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

138680 is a wasteful number, since it uses less digits than its factorization.

138680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 138680 is about 372.3976369420. The cubic root of 138680 is about 51.7612327519.

It can be divided in two parts, 138 and 680, that added together give a palindrome (818).

The spelling of 138680 in words is "one hundred thirty-eight thousand, six hundred eighty".