685716 has 12 divisors (see below), whose sum is σ = 1600032. Its totient is φ = 228568.

The previous prime is 685697. The next prime is 685717. The reversal of 685716 is 617586.

685716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685717) by changing a digit.

685716 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 3 ways as a sum of consecutive naturals, for example, 28560 + ... + 28583.

It is an arithmetic number, because the mean of its divisors is an integer number (133336).

2⁶⁸⁵⁷¹⁶ is an apocalyptic number.

It is an amenable number.

685716 is an abundant number, since it is smaller than the sum of its proper divisors (914316).

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

685716 is a wasteful number, since it uses less digits than its factorization.

685716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57150 (or 57148 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 685716 is about 828.0797063085. The cubic root of 685716 is about 88.1823011468.

The spelling of 685716 in words is "six hundred eighty-five thousand, seven hundred sixteen".