There's only one number that equals 28. The number is . . . . . wait for it . . . . . 28.
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28(-28)
28
There is no 1-digit number that is equal to 14 and 28.
28
Yes. According to Wikipedia, "In mathematics, a rational number is any number that can be expressed as the quotient or fraction a/b of two integers, with the denominator b not equal to zero. Since b may be equal to 1, every integer is a rational number."So 28 can be expressed as 28/1, therefore it is a rational number.