What Does Sp Mean In Numbers?
Parameswaran defined a positive. integer n to be an S-P number if it is the product of the sum of its digits and. the product of its digits; for example, 135 and 144 are S-P numbers because. 135 = (1 + 3 + 5) x (1 x 3 x 5); 144 = (1 + 4 […]