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28 is the Second Perfect Number

12:36 am PHT

And 6 is the first. Perfect numbers are positive integers that are equivalent to the sum of their proper divisors—that is, when you list down all the factors of a perfect number (except itself) and add them all up, you will get the number itself. The proper divisors of 28 are 1, 2, 4, 7, and 14 and their sum is 28. Neat eh? Incidentally, I expanded the Wikipedia article on perfect numbers in 2003 based on a tutorial I wrote back in 1998.

So why am I pontificating about 28 and perfect numbers? Well, I don’t feel perfect at all now that I have reached that age today. (Yeah, it’s my birthday.) Will I ever reach perfection? I don’t think so. We can turn to Buddhism and note the fact that because I’m still alive, I’m not yet in nirvana. And if we’re to consult the Bible, Romans 3:23 says, “for all have sinned and fall short of the glory of God”.

So, while 28 is considered a perfect number, it shouldn’t matter if you yourself don’t feel perfect at that age. If life is already perfect, what’s the point of living then?

Going back to math geekery, here are some more “interesting” properties about the number 28. And you might want to revisit my blog entries for 27, 26, 25, and 24.  :-D

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Comments

Comment times are in Philippine time (+0800).

1

On 12:44 a.m., 20 Aug 2008, joyjoy wrote:

geek!!! hehehe libre libre LIBRE!!!!

2

On 12:45 a.m., 20 Aug 2008, Fritz wrote:

Hey, Eugene, happy birthday man!

3

On 8:32 a.m., 20 Aug 2008, jomer wrote:

Happy birthday and God bless!

4

On 8:37 a.m., 20 Aug 2008, titopao wrote:

Geek! Geek! Geek!

And it takes a fellow geek to appreciate the humor on this post  :P hehehehehe

Happy Birthday  :-D

5

On 8:51 a.m., 20 Aug 2008, Fitz wrote:

Happy birthday!  :D

6

On 9:56 a.m., 20 Aug 2008, floyd wrote:

Happy Birthday Eugene!  =)

7

On 10:41 a.m., 20 Aug 2008, myrya wrote:

Hafi Barthdei!!!

And I appreciated this blog too. Egads, must be a recessive geekery chromosome. must suppress.  :D

8

On 10:44 a.m., 20 Aug 2008, L.A wrote:

Happy Beerday!  :D Wishes you more birthdays to come  :D

9

On 12:10 p.m., 20 Aug 2008, Joni wrote:

W00t! Happy Birthday, Eugene! Here’s to another year!  :)

10

On 2:34 p.m., 20 Aug 2008, seav wrote:

Thanks everyone! And the greetings are well-appreciated.  :-D

11

On 6:54 p.m., 20 Aug 2008, markku wrote:

Happy birthday geek! Libre naman dyan.  ;)

12

On 7:46 p.m., 20 Aug 2008, ia wrote:

Happy birthday! 28 is a lovely number, it’s my favorite. Enjoy it! _

13

On 8:13 p.m., 20 Aug 2008, wilson ng wrote:

28 is still young…. make the most of it!

14

On 1:21 a.m., 21 Aug 2008, Al wrote:

Cool post!

Haha, it’s my very first comment to your blog. I’ve been reading your blog occasionally since first year college (I’m 3rd Year), and I’ve subscribed to your blog (GReader) few months ago. I’ve been enjoying your content. Keep it up!

Happy birthday!! (ang galing, I just turned 19 last 19)  :P

15

On 7:23 a.m., 21 Aug 2008, jorel wrote:

happy bday euge!  :P

16

On 10:53 p.m., 23 Aug 2008, seav wrote:

@Al, thanks for commenting (for the very first time), hehehe. Hope you enjoy reading my blog. And a belated birthday to you too!  :-D

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