57686 has 4 divisors (see below), whose sum is σ = 86532. Its totient is φ = 28842.

The previous prime is 57679. The next prime is 57689. The reversal of 57686 is 68675.

57686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57689) by changing a digit.

57686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (21633).

2⁵⁷⁶⁸⁶ is an apocalyptic number.

57686 is a deficient number, since it is larger than the sum of its proper divisors (28846).

57686 is a wasteful number, since it uses less digits than its factorization.

57686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28845.

The product of its digits is 10080, while the sum is 32.

The square root of 57686 is about 240.1790998401. The cubic root of 57686 is about 38.6387862170.

The spelling of 57686 in words is "fifty-seven thousand, six hundred eighty-six".