307686 has 16 divisors (see below), whose sum is σ = 648000. Its totient is φ = 97128.

The previous prime is 307669. The next prime is 307687. The reversal of 307686 is 686703.

307686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307687) by changing a digit.

307686 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 in 7 ways as a sum of consecutive naturals, for example, 1236 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (40500).

2³⁰⁷⁶⁸⁶ is an apocalyptic number.

307686 is an abundant number, since it is smaller than the sum of its proper divisors (340314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

307686 is a wasteful number, since it uses less digits than its factorization.

307686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 307686 is about 554.6945105191. The cubic root of 307686 is about 67.5101767921.

The spelling of 307686 in words is "three hundred seven thousand, six hundred eighty-six".