Statements (21)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:mathematical_concept
|
| gptkbp:alsoKnownAs |
Niven number
|
| gptkbp:category |
number theory
divisibility rule |
| gptkbp:definedIn |
an integer divisible by the sum of its digits
|
| gptkbp:example |
12
18 21 |
| gptkbp:generalizes |
can be defined in any base
|
| https://www.w3.org/2000/01/rdf-schema#label |
Harshad number
|
| gptkbp:introduced |
gptkb:D._R._Kaprekar
|
| gptkbp:property |
all single-digit numbers are Harshad numbers
in base 10, 1 to 9 are Harshad numbers the sequence is infinite |
| gptkbp:relatedTo |
gptkb:Smith_number
Pronic number |
| gptkbp:sequence |
A005349
|
| gptkbp:studiedBy |
1960
|
| gptkbp:termOrigin |
gptkb:Sanskrit
|
| gptkbp:bfsParent |
gptkb:Hardy-Ramanujan_number
|
| gptkbp:bfsLayer |
7
|