138885 has 16 divisors (see below), whose sum is σ = 228096. Its totient is φ = 72128.

The previous prime is 138883. The next prime is 138889. The reversal of 138885 is 588831.

It is a cyclic number.

It is not a de Polignac number, because 138885 - 2¹ = 138883 is a prime.

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 138885.

It is not an unprimeable number, because it can be changed into a prime (138883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (14256).

2¹³⁸⁸⁸⁵ is an apocalyptic number.

138885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138885 is a deficient number, since it is larger than the sum of its proper divisors (89211).

138885 is a wasteful number, since it uses less digits than its factorization.

138885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its digits is 7680, while the sum is 33.

The square root of 138885 is about 372.6727787215. The cubic root of 138885 is about 51.7867250808.

The spelling of 138885 in words is "one hundred thirty-eight thousand, eight hundred eighty-five".