a perfect number is defined as a positive integer which is the sum of its proper positive divisors, that is, the sum of the positive divisors excluding the number itself
137,438,691,328 is the 7th perfect number.
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49 is the seventh hope this answer comes in handy!
Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".Then the number is called a "perfect square".
28"21" but to be extra smart the answer is "The seventh triangular number is twenty one."
75 is not a Perfect number.
No. 6 is a perfect number, but not 7.