684708 has 12 divisors (see below), whose sum is σ = 1597680. Its totient is φ = 228232.

The previous prime is 684683. The next prime is 684713. The reversal of 684708 is 807486.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684708.

It is an unprimeable number.

684708 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 3 ways as a sum of consecutive naturals, for example, 28518 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (133140).

2⁶⁸⁴⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

684708 is an abundant number, since it is smaller than the sum of its proper divisors (912972).

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

684708 is a wasteful number, since it uses less digits than its factorization.

684708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57066 (or 57064 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 684708 is about 827.4708454079. The cubic root of 684708 is about 88.1390707375.

The spelling of 684708 in words is "six hundred eighty-four thousand, seven hundred eight".