6728228 has 36 divisors (see below), whose sum is σ = 13143060. Its totient is φ = 3010176.

The previous prime is 6728221. The next prime is 6728231. The reversal of 6728228 is 8228276.

It can be written as a sum of positive squares in 6 ways, for example, as 1149184 + 5579044 = 1072^2 + 2362^2 .

Its product of digits (21504) is a multiple of the sum of its prime factors (336).

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 in 11 ways as a sum of consecutive naturals, for example, 24878 + ... + 25146.

It is an arithmetic number, because the mean of its divisors is an integer number (365085).

Almost surely, 2^6728228 is an apocalyptic number.

It is an amenable number.

6728228 is a deficient number, since it is larger than the sum of its proper divisors (6414832).

6728228 is a wasteful number, since it uses less digits than its factorization.

6728228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 321 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 6728228 is about 2593.8828038290. The cubic root of 6728228 is about 188.7847460265.

The spelling of 6728228 in words is "six million, seven hundred twenty-eight thousand, two hundred twenty-eight".