23859 has 12 divisors (see below), whose sum is σ = 37752. Its totient is φ = 14400.

The previous prime is 23857. The next prime is 23869. The reversal of 23859 is 95832.

It is not a de Polignac number, because 23859 - 2¹ = 23857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22 + ... + 219.

It is an arithmetic number, because the mean of its divisors is an integer number (3146).

2²³⁸⁵⁹ is an apocalyptic number.

23859 is a deficient number, since it is larger than the sum of its proper divisors (13893).

23859 is a wasteful number, since it uses less digits than its factorization.

23859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 255 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 23859 is about 154.4635879423. The cubic root of 23859 is about 28.7883923130.

Subtracting from 23859 its sum of digits (27), we obtain a palindrome (23832).

The spelling of 23859 in words is "twenty-three thousand, eight hundred fifty-nine".