684204 has 48 divisors (see below), whose sum is σ = 1736448. Its totient is φ = 209088.

The previous prime is 684191. The next prime is 684217. The reversal of 684204 is 402486.

It is an interprime number because it is at equal distance from previous prime (684191) and next prime (684217).

It is a super-2 number, since 2×684204² = 936270227232, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684204.

It is an unprimeable number.

684204 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 15 ways as a sum of consecutive naturals, for example, 10179 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (36176).

2⁶⁸⁴²⁰⁴ 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 684204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868224).

684204 is an abundant number, since it is smaller than the sum of its proper divisors (1052244).

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

684204 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 684204 = (428064)₁₁.

684204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 684204 is about 827.1662468936. The cubic root of 684204 is about 88.1174396210.

It can be divided in two parts, 684 and 204, that added together give a palindrome (888).

The spelling of 684204 in words is "six hundred eighty-four thousand, two hundred four".