685772 has 12 divisors (see below), whose sum is σ = 1208256. Its totient is φ = 340560.

The previous prime is 685759. The next prime is 685781. The reversal of 685772 is 277586.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (100688).

2⁶⁸⁵⁷⁷² is an apocalyptic number.

It is an amenable number.

685772 is a deficient number, since it is larger than the sum of its proper divisors (522484).

685772 is a wasteful number, since it uses less digits than its factorization.

685772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168 (or 1166 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 685772 is about 828.1135187883. The cubic root of 685772 is about 88.1847015937.

The spelling of 685772 in words is "six hundred eighty-five thousand, seven hundred seventy-two".