A Harshad number, also called a Niven number, is an integer that is divisible by the sum of its own digits when written in a given base. Because the condition depends on the digit representation, a number can be a Harshad number in one base while failing to be one in another. The concept was defined by the Indian mathematician D. R. Kaprekar, and the name Harshad derives from Sanskrit words meaning joy-giver.
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1. Harshad Number (Wikipedia)
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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.
Attributed To: Ivan Niven, Lead paragraph
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
View the SourceWolfram MathWorld: Harshad Number
Wolfram MathWorldIn Branch: Number Theory, Subject classificationsQuote, In Branch: Number Theory, Subject classifications
Number Theory Special Numbers
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