684696 has 32 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 223008.

The previous prime is 684683. The next prime is 684713. The reversal of 684696 is 696486.

It is a super-2 number, since 2×684696² = 937617224832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

684696 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, 825 + ... + 1431.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁶⁸⁴⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875520).

684696 is an abundant number, since it is smaller than the sum of its proper divisors (1066344).

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

684696 is a wasteful number, since it uses less digits than its factorization.

684696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 659 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 684696 is about 827.4635943653. The cubic root of 684696 is about 88.1385558343.

The spelling of 684696 in words is "six hundred eighty-four thousand, six hundred ninety-six".