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Statements

Subject Item
dbr:Sum-product_number
rdf:type
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rdfs:label
Sum-product number
rdfs:comment
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.
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dbr:Product-over-sum
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dbc:Base-dependent_integer_sequences dbc:Arithmetic_dynamics
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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.
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