This notation is called **Standard notation** of **Scientific notation** (both words mean the same). It is a number between 1 and 10 times a power of 10.

In **Normal notation**, you would write this number as

335 889 526 440 (So more than 300 billion)

at the end means you move the decimal point 11 places to the right.

If you have no more numbers to write down, you add zeros.