7314
The largest even number that can be made with those digits is 9740 .
If the number formed by the last three digits is divisible by 8. This requires that: if the digit in the hundreds place is even, the last two digits must form a number divisible by 8 and if the digit in the hundreds place is odd, the last two digits must form a number divisible by 4 but not by 8.
There is no such number as if you ever find one, add 1 to it and then you'll have an even larger number.
Standard Form
The standard form of a whole number is when a whole number is written in digits with commas separating the digits into groups of three starting from right to left
9876543210 as a string. However, if you allow other ways of combining digits, the answer becomes impossible - since there is no limit to the ways in which such operations might be defined.
Standard form
Any two digit number in which: (a) the units digit is not 0, and (b) the two digits are different will form a new 2-digit number when the digits are interchanged.
The number of digits is log10(Graham's number) rounded up to the next whole number; this number is still extremely large and impossible to write in simplified form.
12 over 13. Common factor of 6. (Digits add to a number divisible by 3 and they are even). 12 over 13.
145,689
145689