9,999 is the greatest four digit number.
All of the four-digit multiples of 400 end in 00.
It is called a 28-digit number!
If your asking in a digit it's called a 4 digit number and it is the smallest 4 digit number
The answer is vague but correct . Take any prime number and any other number whose combined digit length is 401 and their product will generate a 400 or a 401 digit number.
It is 6.
It is 400, exactly as in the question. A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right.
It is called a twelve-digit number. Its exact name will depend on the number.
A 22 digit number is called a quintillion.