6728449 has 8 divisors (see below), whose sum is σ = 8281280. Its totient is φ = 5323536.

The previous prime is 6728441. The next prime is 6728467. The reversal of 6728449 is 9448276.

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

It is a cyclic number.

It is not a de Polignac number, because 6728449 - 2³ = 6728441 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 36879 + ... + 37060.

It is an arithmetic number, because the mean of its divisors is an integer number (1035160).

Almost surely, 2^6728449 is an apocalyptic number.

It is an amenable number.

6728449 is a deficient number, since it is larger than the sum of its proper divisors (1552831).

6728449 is a wasteful number, since it uses less digits than its factorization.

6728449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73959.

The product of its digits is 96768, while the sum is 40.

The square root of 6728449 is about 2593.9254037077. The cubic root of 6728449 is about 188.7868129884.

The spelling of 6728449 in words is "six million, seven hundred twenty-eight thousand, four hundred forty-nine".