682686 has 48 divisors (see below), whose sum is σ = 1651104. Its totient is φ = 202752.

The previous prime is 682679. The next prime is 682697. The reversal of 682686 is 686286.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 682686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6990 + ... + 7086.

It is an arithmetic number, because the mean of its divisors is an integer number (34398).

2⁶⁸²⁶⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 682686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825552).

682686 is an abundant number, since it is smaller than the sum of its proper divisors (968418).

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

682686 is a wasteful number, since it uses less digits than its factorization.

682686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 142 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 682686 is about 826.2481467453. The cubic root of 682686 is about 88.0522245103.

Subtracting 682686 from its reverse (686286), we obtain a square (3600 = 60²).

The spelling of 682686 in words is "six hundred eighty-two thousand, six hundred eighty-six".