One can buy 800 numbers from various websites. Avoxi, Tollfreenumbers, 800forall, unitelvoice, ring central and the unitel group are a few of the websites where 800 numbers can be brought.
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If someone wants their own 800 number for various reasons then they can find the listings of those that are available at available-800-numbers. They are a fun buy and they can be useful for business as well.
The sum of the first 800 consecutive numbers is 320,400.
Half of 10 is 5.So numbers in the range 800 ± 5 round to 800 to the nearest 10, except that numbers exactly half way round up. Thus all numbers greater than or equal to 800 - 5 round up to 800 and all numbers less than 800 + 5 round down to 800,That is all numbers greater than or equal to 795 and less than 805 will round to 800 to the nearest 10.
They are all of the numbers from 1 to 800 that have more than two factors in them.
It is 800, the middle number when they are arranged in order.