381654729 : An Interesting Number Happened To Me Today

You might be thinking why am I writing about an individual number? Actually, in previous year annual exams, my registration number was 381654729. Which is just an ‘ordinary’ 9-digit long number. I never cared about it- and forgot it after exam results were announced. But today morning, when I opened “Mathematics Today” magazine’s October 2010, page 8; I was brilliantly shocked. 381654729 is a nine digit number with each of the digits from 1 to 9 appearing once. The whole number is divisible by 9. If you remove the right-most digit, the remaining eight-digit number is divisible by 8. Again removing the next-right-most digit leaves a seven-digit number that is divisible by 7. Similarly, removing next-rightmost digit leaves a six-digit number that is divisible by 6. This property continues all the way down to one digit.

Further research on this number turned out to have a name “Poly-divisible Number.”

Mathematical Wonders happen with Mathematicians. :-)

First time here? Try these resources...

  1. Best VPN Services
  2. Best WordPress Hostings
  3. Best WordPress Themes
  4. Best WordPress Plugins
  5. Best Gutenberg Block Plugins
  6. Best Email Marketing Plugins
  7. Best WordPress Caching Plugins
  8. Best WooCommerce Plugins
  9. Email Marketing Guide for Beginners
  10. Best Small Business Apps
  11. Best Business Name Generators
  12. Top Plagiarism Checkers
  13. Free Web Hosting Services
  14. Best Online Businesses to Start
  15. Best Online Course Platforms
  16. Best Online Casinos in India
  17. Best Affiliate Marketing Programs
  18. More Resources...

Get useful blogging, marketing and learning resources, delivered to your mailbox. Plus, get regularly updated with extra tools & guides to help you learn, grow and earn better.

Get 17+ exclusive e-books & templates for free, to begin with. 🎁

%d bloggers like this: