684244646 has 8 divisors (see below), whose sum is σ = 1026478200. Its totient is φ = 342085248.

The previous prime is 684244619. The next prime is 684244651. The reversal of 684244646 is 646442486.

684244646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 684244597 and 684244606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24710 + ... + 44486.

It is an arithmetic number, because the mean of its divisors is an integer number (128309775).

Almost surely, 2^684244646 is an apocalyptic number.

684244646 is a deficient number, since it is larger than the sum of its proper divisors (342233554).

684244646 is a wasteful number, since it uses less digits than its factorization.

684244646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37078.

The product of its digits is 884736, while the sum is 44.

The square root of 684244646 is about 26158.0703799038. The cubic root of 684244646 is about 881.1918449560.

The spelling of 684244646 in words is "six hundred eighty-four million, two hundred forty-four thousand, six hundred forty-six".