Basic Examples (2) 

Test if 2023 is a harshad number:

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Test another number:

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Scope (2) 

Test a list of numbers:

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Give the base explicitly:

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Use a different base:

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Possible Issues (3) 

Base 0 can not be computed:

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Base 1 can not be computed:

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The number 0 can not be divided by itself:

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Neat Examples (4) 

12 is a harshad number in multiple bases:

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12 is not an 8-harshad number:

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The number 2016502858579884466176 is a multiple harshad number:

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Find the first 1000 harshad numbers and visualize them:

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All numbers up to a 10000 are either a harshad number, or the sum of two harshad numbers:

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