+**28** is a [natural number](/wiki/Natural_number) following 27 and preceding 29. It holds distinction as the second [perfect number](/wiki/Perfect_number), being equal to the sum of its proper positive divisors (1, 2, 4, 7, 14). This property highlights its unique place in elementary number theory.
+## See also
+- [Number](/wiki/Number)
+- [Prime Number](/wiki/Prime_Number)
+- [Divisor](/wiki/Divisor)
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