23686 has 8 divisors (see below), whose sum is σ = 38304. Its totient is φ = 10920.

The previous prime is 23677. The next prime is 23687. The reversal of 23686 is 68632.

23686 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×23686² = 1122053192, which contains 22 as substring.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 23686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23687) by changing a digit.

23686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (4788).

2²³⁶⁸⁶ is an apocalyptic number.

23686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23686 is a deficient number, since it is larger than the sum of its proper divisors (14618).

23686 is a wasteful number, since it uses less digits than its factorization.

23686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926.

The product of its digits is 1728, while the sum is 25.

The square root of 23686 is about 153.9025665803. The cubic root of 23686 is about 28.7186425597.

The spelling of 23686 in words is "twenty-three thousand, six hundred eighty-six".