You write it as 400000, 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. A decimal representation does not require a decimal point.
01.4
It is 3526.49
400000
40,400,20,000
It is 400000.
To write nine tenths as a decimal, it looks like this: .9
Yes, that is correct. In general, to convert units to millions, you divide by a million; this is equivalent to moving the decimal point six positions to the left. Note that 400000 has an implied decimal point; it's the same as 400000.0.
Rounded to two decimal places, the square root of 400000 is equal to 632.46.
400,000,000,000
It is 3526.49
1098.9011
400000
Four hundred thousand.
Give the standard from
It is 40,000,420,000
It is 4*10^5.
four hundred thousand
400,000 or 400000 is four hundred thousand.