684068 has 24 divisors (see below), whose sum is σ = 1493184. Its totient is φ = 266400.

The previous prime is 684053. The next prime is 684091. The reversal of 684068 is 860486.

It is a congruent number.

It is an unprimeable number.

684068 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803 + ... + 1418.

It is an arithmetic number, because the mean of its divisors is an integer number (62216).

2⁶⁸⁴⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

684068 is an abundant number, since it is smaller than the sum of its proper divisors (809116).

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

684068 is a wasteful number, since it uses less digits than its factorization.

684068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243 (or 2241 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 684068 is about 827.0840344246. The cubic root of 684068 is about 88.1116008332. Note that the first 3 decimals are identical.

The spelling of 684068 in words is "six hundred eighty-four thousand, sixty-eight".