684084 has 24 divisors (see below), whose sum is σ = 1613920. Its totient is φ = 225504.

The previous prime is 684053. The next prime is 684091. The reversal of 684084 is 480486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1047 + ... + 1569.

2⁶⁸⁴⁰⁸⁴ is an apocalyptic number.

It is an amenable number.

684084 is an abundant number, since it is smaller than the sum of its proper divisors (929836).

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

684084 is a wasteful number, since it uses less digits than its factorization.

684084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 684084 is about 827.0937069039. The cubic root of 684084 is about 88.1122877896.

The spelling of 684084 in words is "six hundred eighty-four thousand, eighty-four".