138860 has 24 divisors (see below), whose sum is σ = 299376. Its totient is φ = 54080.

The previous prime is 138841. The next prime is 138863. The reversal of 138860 is 68831.

138860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138863) 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, 995 + ... + 1125.

It is an arithmetic number, because the mean of its divisors is an integer number (12474).

2¹³⁸⁸⁶⁰ is an apocalyptic number.

138860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138860 is an abundant number, since it is smaller than the sum of its proper divisors (160516).

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

138860 is a wasteful number, since it uses less digits than its factorization.

138860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 191 counting only the distinct ones).

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

The square root of 138860 is about 372.6392357227. The cubic root of 138860 is about 51.7836176038.

The spelling of 138860 in words is "one hundred thirty-eight thousand, eight hundred sixty".