685802 has 12 divisors (see below), whose sum is σ = 1114470. Its totient is φ = 316368.

The previous prime is 685793. The next prime is 685819. The reversal of 685802 is 208586.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 564001 + 121801 = 751^2 + 349^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 685802.

It is an unprimeable number.

685802 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 5 ways as a sum of consecutive naturals, for example, 677 + ... + 1352.

2⁶⁸⁵⁸⁰² is an apocalyptic number.

685802 is a deficient number, since it is larger than the sum of its proper divisors (428668).

685802 is a wasteful number, since it uses less digits than its factorization.

685802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2044 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 685802 is about 828.1316320489. The cubic root of 685802 is about 88.1859874936.

The spelling of 685802 in words is "six hundred eighty-five thousand, eight hundred two".