6728256 has 42 divisors (see below), whose sum is σ = 19286982. Its totient is φ = 2242560.

The previous prime is 6728251. The next prime is 6728257. The reversal of 6728256 is 6528276.

It can be written as a sum of positive squares in only one way, i.e., 5760000 + 968256 = 2400^2 + 984^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6728256.

It is not an unprimeable number, because it can be changed into a prime (6728251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5265 + ... + 6416.

Almost surely, 2^6728256 is an apocalyptic number.

It is an amenable number.

6728256 is an abundant number, since it is smaller than the sum of its proper divisors (12558726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6728256 is a wasteful number, since it uses less digits than its factorization.

6728256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11699 (or 11686 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 6728256 is about 2593.8882011374. Note that the first 3 decimals coincide. The cubic root of 6728256 is about 188.7850079066.

The spelling of 6728256 in words is "six million, seven hundred twenty-eight thousand, two hundred fifty-six".