684884 has 12 divisors (see below), whose sum is σ = 1224384. Its totient is φ = 335064.

The previous prime is 684869. The next prime is 684889. The reversal of 684884 is 488486.

684884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634 + ... + 2009.

It is an arithmetic number, because the mean of its divisors is an integer number (102032).

2⁶⁸⁴⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

684884 is a deficient number, since it is larger than the sum of its proper divisors (539500).

684884 is a wasteful number, since it uses less digits than its factorization.

684884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694 (or 3692 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 684884 is about 827.5771867325. The cubic root of 684884 is about 88.1466219601.

The spelling of 684884 in words is "six hundred eighty-four thousand, eight hundred eighty-four".