2016502858579884466176 - Numberphile

Video Description

Tony Padilla on Harshad Numbers. Learn for free on Brilliant (and get 20% off a premium subscription) at https://brilliant.org/numberphile (episode sponsor). More links & stuff in full description below ↓↓↓ Extra footage from this interview can be found on Numberphile2 - https://youtu.be/iGEC1FH5yBU Harshad Numbers are also known as Niven Numbers. Tony Padilla's book Fantastic Numbers and Where to Find Them - https://amzn.to/3VywNyy More from Tony on Numberphile - https://www.youtube.com/playlist?list=PLt5AfwLFPxWL8KAJKO3WfHhJcWrJfjgfU Plus Tony on Sixty Symbols - https://www.youtube.com/playlist?list=PLcUY9vudNKBPJmX64Jay51cdZTKMz4ACs Here's a Harshad Tester (for various bases) based on Tony's code: https://www.numberphile.com/is-it-a-harshad-number (sorry for an problems, I was kind of experimenting here) On Consecutive Niven Numbers (paper): https://www.fq.math.ca/Scanned/31-2/cooper.pdf Additive bases and Niven numbers (paper): https://arxiv.org/abs/2101.07593 Patreon: http://www.patreon.com/numberphile Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://bit.ly/numberphile-janestreet We are also grateful for support from Ben Delo. NUMBERPHILE Website: http://www.numberphile.com/ Videos by Brady Haran Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Used some AI to represent the old greats doing math in the offices.