684144684 has 48 divisors (see below), whose sum is σ = 1834879200. Its totient is φ = 220183488.

The previous prime is 684144679. The next prime is 684144697. The reversal of 684144684 is 486441486.

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, 106087 + ... + 112350.

It is an arithmetic number, because the mean of its divisors is an integer number (38226650).

Almost surely, 2^684144684 is an apocalyptic number.

It is an amenable number.

684144684 is an abundant number, since it is smaller than the sum of its proper divisors (1150734516).

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

684144684 is a wasteful number, since it uses less digits than its factorization.

684144684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218479 (or 218471 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The square root of 684144684 is about 26156.1595804889. The cubic root of 684144684 is about 881.1489314603.

The spelling of 684144684 in words is "six hundred eighty-four million, one hundred forty-four thousand, six hundred eighty-four".