684330 has 16 divisors (see below), whose sum is σ = 1642464. Its totient is φ = 182480.

The previous prime is 684329. The next prime is 684337. The reversal of 684330 is 33486.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 684330.

It is not an unprimeable number, because it can be changed into a prime (684337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11376 + ... + 11435.

It is an arithmetic number, because the mean of its divisors is an integer number (102654).

2⁶⁸⁴³³⁰ is an apocalyptic number.

684330 is an abundant number, since it is smaller than the sum of its proper divisors (958134).

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

684330 is a wasteful number, since it uses less digits than its factorization.

684330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22821.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 684330 is about 827.2424070368. The cubic root of 684330 is about 88.1228483957.

The spelling of 684330 in words is "six hundred eighty-four thousand, three hundred thirty".