138610 has 16 divisors (see below), whose sum is σ = 254016. Its totient is φ = 54448.

The previous prime is 138599. The next prime is 138617. The reversal of 138610 is 16831.

138610 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 (138617) by changing a digit.

138610 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, 747 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (15876).

2¹³⁸⁶¹⁰ is an apocalyptic number.

138610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138610 is a deficient number, since it is larger than the sum of its proper divisors (115406).

138610 is a wasteful number, since it uses less digits than its factorization.

138610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 138610 is about 372.3036395202. The cubic root of 138610 is about 51.7525223008.

The spelling of 138610 in words is "one hundred thirty-eight thousand, six hundred ten".