684008868 has 24 divisors (see below), whose sum is σ = 1665413568. Its totient is φ = 218089696.

The previous prime is 684008867. The next prime is 684008879. The reversal of 684008868 is 868800486.

It is not an unprimeable number, because it can be changed into a prime (684008861) 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, 1238871 + ... + 1239422.

It is an arithmetic number, because the mean of its divisors is an integer number (69392232).

Almost surely, 2^684008868 is an apocalyptic number.

It is an amenable number.

684008868 is an abundant number, since it is smaller than the sum of its proper divisors (981404700).

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

684008868 is a wasteful number, since it uses less digits than its factorization.

684008868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478323 (or 2478321 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The square root of 684008868 is about 26153.5631989219. The cubic root of 684008868 is about 881.0906192123.

The spelling of 684008868 in words is "six hundred eighty-four million, eight thousand, eight hundred sixty-eight".