684672844 has 12 divisors (see below), whose sum is σ = 1206924264. Its totient is φ = 339837344.

The previous prime is 684672823. The next prime is 684672853. The reversal of 684672844 is 448276486.

It is a happy number.

684672844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×684672844² = 937553806622096672, which contains 22 as substring.

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, 624154 + ... + 625249.

It is an arithmetic number, because the mean of its divisors is an integer number (100577022).

Almost surely, 2^684672844 is an apocalyptic number.

It is an amenable number.

684672844 is a deficient number, since it is larger than the sum of its proper divisors (522251420).

684672844 is a wasteful number, since it uses less digits than its factorization.

684672844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249544 (or 1249542 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 49.

The square root of 684672844 is about 26166.2539160652. The cubic root of 684672844 is about 881.3756222573.

The spelling of 684672844 in words is "six hundred eighty-four million, six hundred seventy-two thousand, eight hundred forty-four".