40000 is written as Forty Thousand in words in the Indian number system. This is the correct and standard spelling used in academic, banking, and official documents. Then you may see that the 40 thousand in numbers takes more space but if we write that down in scientific notation then it will look like this : 4 × 104 How many zeros does 40 thousand have? When we count zeros in 40 thousand above, we see that there are 4 zeros. If you want to write 40 thousand in words, then it will be written as ` forty ... How do you spell the number 40 ? This is some confusion about whether its forty or fourty , thanks in part to history, but in this article we clear up the confusion and explain without doubt how to spell the number 40 . Write 40000 in English Words How to write 40000 in english words? - The number 40000 written in english words is " forty thousand ". Spell, say, write number 40000 in english by using our numbers to words calculator.