684298668 has 48 divisors (see below), whose sum is σ = 1678199040. Its totient is φ = 216600384.

The previous prime is 684298633. The next prime is 684298673. The reversal of 684298668 is 866892486.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29446 + ... + 47282.

It is an arithmetic number, because the mean of its divisors is an integer number (34962480).

Almost surely, 2^684298668 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 684298668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (839099520).

684298668 is an abundant number, since it is smaller than the sum of its proper divisors (993900372).

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

684298668 is a wasteful number, since it uses less digits than its factorization.

684298668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18006 (or 18004 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 684298668 is about 26159.1029662716. The cubic root of 684298668 is about 881.2150347578.

The spelling of 684298668 in words is "six hundred eighty-four million, two hundred ninety-eight thousand, six hundred sixty-eight".