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About: Sum-product number     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Series108457976, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:WikicatBase-dependentIntegerSequencesyago:Abstraction100002137yago:Arrangement107938773yago:Group100031264yago:Ordering108456993yago:Sequence108459252yago:Series108457976 New Facet based on Instances of this Class

A sum-product number in a given number base is a natural number that is equal to the product of the sum of its digits and the product of its digits. There are a finite number of sum-product numbers in any given base . In base 10, there are exactly four sum-product numbers (sequence in the OEIS): 0, 1, 135, and 144.