682644 has 24 divisors (see below), whose sum is σ = 1607200. Its totient is φ = 225504.

The previous prime is 682637. The next prime is 682657. The reversal of 682644 is 446286.

It is a congruent number.

It is an unprimeable number.

682644 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 7 ways as a sum of consecutive naturals, for example, 1782 + ... + 2130.

2⁶⁸²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

682644 is an abundant number, since it is smaller than the sum of its proper divisors (924556).

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

682644 is a wasteful number, since it uses less digits than its factorization.

682644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 517 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 682644 is about 826.2227302610. Note that the first 3 decimals coincide. The cubic root of 682644 is about 88.0504187659.

It can be divided in two parts, 682 and 644, that added together give a triangular number (1326 = T₅₁).

The spelling of 682644 in words is "six hundred eighty-two thousand, six hundred forty-four".