Ten million
- smallest number
as in a 1 and 7 0
10,000,000
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8 Digits!
a 8-digits palindromic number is a number consisting of a 4-digits number written and then written backward, i.e. 1234 4321 so there are as many palindromic 8-digits numbers as 4-digits numbers so from 1000 to 9999, so there are 8999 palindromic 8 digits number (I assumed that 00011000 is not to be considered as a valid 8 digit number)
8
If the last 3 digits are divisible by 8 and the sum of the digits are divisible by 9.
If the last 3 digits are divisible by 8, the number is divisible by 8.