The sum of all integers from 1 to 2000 is 2001000
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The answer to the smallest possible value of the sum of all the digits is 1. the number can either be 100 or 1000 - either way the sum is still one.
subtract any number form nine and then with that answer and the number you subtracted 9 with, those added, make the sum of nine
Abundant is a number for which the sum of all its proper factors is greater than the number itself. Deficient is a number for which the sum of all its proper factors is less than the number itself. Perfect is a number for which the sum of all its proper factors is the number itself.
The number is 81.
There are 7 significant figures in this number.