Yes it is. 6 is the first perfect number, 28 is the second perfect number.
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No, it is not near a perfect number. The first four known perfect numbers are 6, 28, 496 and 8,128.
28 is a perfect number. Add the factors of the number, excluding the number itself. 28: 1 +2 +4 + 7 + 14 = 28. The sum of its factors is the same as the number! The next perfect numbers are 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176, and 191561942608236107294793378084303638130997321548169216. Chances are that you won't be using that!
The next one is 28.
24 is not a perfect number as its factors (excluding 24) are: 1, 2, 3, 4, 6, 8 and 12 which add to give 36 not 24. However, 28 is a perfect number as its factors (excluding 28) are: 1, 2, 4, 7 and 14 which add to give 28.
6 and 28