No, 28 is a Composite Number.
Prime factors of 256=2x2x2x2x2x2x2x2 (or 28)
There is no prime number equal to 28. I know you must find this disappointing.
No, 1 is not a prime number.
It can be. 27 is relatively prime to 28.
They are: 2*2*7 = 28
28 is a composite number because it has more than two factors but 29 is a prime number because it has only two factors.
7 is prime.
23 is the only prime number between 20 and 28.
The prime numbers (factors) of 28 are: 2 and 7
61 is prime 28 = 4 x 7 = 2 x 14 83 is prime 29 is prime
1, 4, 14, 28