684367844 has 24 divisors (see below), whose sum is σ = 1280418048. Its totient is φ = 318925440.

The previous prime is 684367823. The next prime is 684367907. The reversal of 684367844 is 448763486.

It is a junction number, because it is equal to n+sod(n) for n = 684367792 and 684367801.

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, 41852 + ... + 55859.

It is an arithmetic number, because the mean of its divisors is an integer number (53350752).

Almost surely, 2^684367844 is an apocalyptic number.

It is an amenable number.

684367844 is a deficient number, since it is larger than the sum of its proper divisors (596050204).

684367844 is a wasteful number, since it uses less digits than its factorization.

684367844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97835 (or 97833 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 50.

The square root of 684367844 is about 26160.4251494505. The cubic root of 684367844 is about 881.2447278728.

The spelling of 684367844 in words is "six hundred eighty-four million, three hundred sixty-seven thousand, eight hundred forty-four".