684863168 has 56 divisors (see below), whose sum is σ = 1495866960. Its totient is φ = 308510720.

The previous prime is 684863149. The next prime is 684863177. The reversal of 684863168 is 861368486.

It is a happy 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, 75248 + ... + 83856.

It is an arithmetic number, because the mean of its divisors is an integer number (26711910).

Almost surely, 2^684863168 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 684863168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747933480).

684863168 is an abundant number, since it is smaller than the sum of its proper divisors (811003792).

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

684863168 is a wasteful number, since it uses less digits than its factorization.

684863168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745 (or 8735 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 684863168 is about 26169.8904850594. The cubic root of 684863168 is about 881.4572823740.

The spelling of 684863168 in words is "six hundred eighty-four million, eight hundred sixty-three thousand, one hundred sixty-eight".