PS numbers

[Eric Angelini]

>>   1236
>>
>>   Sum of digits:  S = 12
>>   Product of digits: P = 36
>>
>>   ... so 1236 could be defined as an « SP number ».
>>
>>   I found that 10, 20, 30, ... 90 are SP numbers too...
>>   (big deal!)
>>
>>   Could someone compute them all? (Has it been done already?)

> Sorry, it is A062237

... yes, but where are the PS's ?

... 3612 is such a number, of course

Best,
É.
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