Harshad number

Rarity: Uncommon

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Notion

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Science and technology

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What Wikipedia says

In recreational mathematics, a Harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that base. Harshad numbers in base n are also known as n-harshad (or n-Niven) numbers.

Excerpt from the Wikipedia article “Harshad number”, under the CC BY-SA 4.0 license. Read the article on Wikipedia