Etymology

Harshad number

Today it means: A positive integer which is divisible by the sum of all of its digits. Full definition →

Sanskrit हर्षद
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The story

  1. Sanskrit · derived fromहर्षद“giving joy”
  2. English todayHarshad number

Coined by Indian recreational mathematician D. R. Kaprekar, from Sanskrit हर्षद (harṣada, “giving joy”). The capitalization is likely based on mathematicians' incorrect assumption that harshad is a proper noun.

Etymology from Wiktionary, CC BY-SA 4.0.