685786 has 8 divisors (see below), whose sum is σ = 1082880. Its totient is φ = 324828.

The previous prime is 685781. The next prime is 685793. The reversal of 685786 is 687586.

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

It is not an unprimeable number, because it can be changed into a prime (685781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8986 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (135360).

2⁶⁸⁵⁷⁸⁶ is an apocalyptic number.

685786 is a deficient number, since it is larger than the sum of its proper divisors (397094).

685786 is a wasteful number, since it uses less digits than its factorization.

685786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18068.

The product of its digits is 80640, while the sum is 40.

The square root of 685786 is about 828.1219716926. The cubic root of 685786 is about 88.1853016849.

The spelling of 685786 in words is "six hundred eighty-five thousand, seven hundred eighty-six".