Q: Is 28 a 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

Related questions

A perfect number is a number that is the sum of all its proper factors (that is all its factors excluding itself). The next perfect number after 28 is 496

A number is perfect if all it's factors (barring itself) sum to make the original number. In this case, the factors of 28 are 1,2,4,7 and 14. Added up, these equal 28. Thus, 28 is a perfect number.

The next perfect number after 11 is 28.

28 is a perfect number.

29 is not a perfect number - though 28, its predecessor, is.

22 is not a perfect number but 6, 28, 496 and 8128 are perfect numbers.

28

No, but 28 is...

No, it is not a perfect number. The first four known perfect numbers are 6, 28, 496 and 8,128.

It isn't a perfect number.A perfect number is a number which is the sum of its proper divisors (including 1, but excluding itself).The divisors of 20 are 1, 2, 4, 5, 10.1 + 2 + 4 + 5 + 10 = 22 => 20 is not a perfect number.An example of a perfect number is 28:The divisors of 28 are 1, 2, 4, 7, 141 + 2 + 4 + 7 + 14 = 28 => 28 is a perfect number.

The second perfect number after 6 is 28. The sum of the factors of 28, excluding itself, is 1 + 2 + 4 + 7 + 14 = 28.

2002 is not a perfect number. The first four perfect numbers are 6, 28, 496, and 8128.