6728224 has 12 divisors (see below), whose sum is σ = 13246254. Its totient is φ = 3364096.

The previous prime is 6728221. The next prime is 6728231. The reversal of 6728224 is 4228276.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 71824 = 2580^2 + 268^2 .

It is not an unprimeable number, because it can be changed into a prime (6728221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105097 + ... + 105160.

Almost surely, 2^6728224 is an apocalyptic number.

It is an amenable number.

6728224 is a deficient number, since it is larger than the sum of its proper divisors (6518030).

6728224 is a wasteful number, since it uses less digits than its factorization.

6728224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210267 (or 210259 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 6728224 is about 2593.8820327841. The cubic root of 6728224 is about 188.7847086150.

The spelling of 6728224 in words is "six million, seven hundred twenty-eight thousand, two hundred twenty-four".