EPISODE · Mar 30, 2010 · 20 MIN
140more
from MichaelD · host michaelD
1hundredandforty1 140 is an abundant number and a harmonic divisor number. It is the sum of the squares of the first seven integers, which makes it a square pyramidal number, and in base 10 it is divisible by the sum of its digits, which makes it a Harshad number. The sum of Euler's totient function φ(x) over the first twenty-one integers is 140.
Embed this episode
Ready to play
140more
0:00
20:00
1×
No transcript for this episode yet
Similar Episodes
No similar episodes found.
Similar Podcasts
No similar podcasts found.
Frequently Asked Questions
How long is this episode of MichaelD?
This episode is 20 minutes long.
When was this MichaelD episode published?
This episode was published on March 30, 2010.
Can I download this MichaelD episode?
Yes. Use the download control on the episode player to save the publisher-provided media file.
URL copied to clipboard!