6728445 has 12 divisors (see below), whose sum is σ = 11662716. Its totient is φ = 3588480.

The previous prime is 6728441. The next prime is 6728467. The reversal of 6728445 is 5448276.

6728445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4848804 + 1879641 = 2202^2 + 1371^2 .

It is not a de Polignac number, because 6728445 - 2² = 6728441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74716 + ... + 74805.

It is an arithmetic number, because the mean of its divisors is an integer number (971893).

Almost surely, 2^6728445 is an apocalyptic number.

It is an amenable number.

6728445 is a deficient number, since it is larger than the sum of its proper divisors (4934271).

6728445 is a wasteful number, since it uses less digits than its factorization.

6728445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149532 (or 149529 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 6728445 is about 2593.9246326754. The cubic root of 6728445 is about 188.7867755777.

The spelling of 6728445 in words is "six million, seven hundred twenty-eight thousand, four hundred forty-five".