138586 has 16 divisors (see below), whose sum is σ = 250560. Its totient is φ = 56160.

The previous prime is 138581. The next prime is 138587. The reversal of 138586 is 685831.

138586 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 (138581) 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, 6 + ... + 526.

It is an arithmetic number, because the mean of its divisors is an integer number (15660).

2¹³⁸⁵⁸⁶ is an apocalyptic number.

138586 is a deficient number, since it is larger than the sum of its proper divisors (111974).

138586 is a wasteful number, since it uses less digits than its factorization.

138586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its digits is 5760, while the sum is 31.

The square root of 138586 is about 372.2714063691. The cubic root of 138586 is about 51.7495351853.

The spelling of 138586 in words is "one hundred thirty-eight thousand, five hundred eighty-six".