684344 has 16 divisors (see below), whose sum is σ = 1294920. Its totient is φ = 339040.

The previous prime is 684337. The next prime is 684347. The reversal of 684344 is 443486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684347) 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, 722 + ... + 1374.

2⁶⁸⁴³⁴⁴ is an apocalyptic number.

It is an amenable number.

684344 is a deficient number, since it is larger than the sum of its proper divisors (610576).

684344 is a wasteful number, since it uses less digits than its factorization.

684344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 786 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 684344 is about 827.2508688421. The cubic root of 684344 is about 88.1234493297.

The spelling of 684344 in words is "six hundred eighty-four thousand, three hundred forty-four".