6728685 has 16 divisors (see below), whose sum is σ = 11399616. Its totient is φ = 3377408.

The previous prime is 6728663. The next prime is 6728713. The reversal of 6728685 is 5868276.

6728685 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6728685 - 2⁵ = 6728653 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

6728685 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12939 + ... + 13448.

It is an arithmetic number, because the mean of its divisors is an integer number (712476).

Almost surely, 2^6728685 is an apocalyptic number.

It is an amenable number.

6728685 is a deficient number, since it is larger than the sum of its proper divisors (4670931).

6728685 is a wasteful number, since it uses less digits than its factorization.

6728685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26412.

The product of its digits is 161280, while the sum is 42.

The square root of 6728685 is about 2593.9708942083. The cubic root of 6728685 is about 188.7890201918.

The spelling of 6728685 in words is "six million, seven hundred twenty-eight thousand, six hundred eighty-five".