3686 has 8 divisors (see below), whose sum is σ = 5880. Its totient is φ = 1728.

The previous prime is 3677. The next prime is 3691. The reversal of 3686 is 6863.

3686 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

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

It is a plaindrome in base 15.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable 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, 11 + ... + 86.

It is an arithmetic number, because the mean of its divisors is an integer number (735).

3686 is a deficient number, since it is larger than the sum of its proper divisors (2194).

3686 is a wasteful number, since it uses less digits than its factorization.

3686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118.

The product of its digits is 864, while the sum is 23.

The square root of 3686 is about 60.7124369466. The cubic root of 3686 is about 15.4472714012.

Subtracting from 3686 its sum of digits (23), we obtain a palindrome (3663).

The spelling of 3686 in words is "three thousand, six hundred eighty-six".