The notation \(2.788E10\) is already in scientific notation. In this format, the number \(2.788\) is multiplied by \(10^{10}\).
To express it clearly, you can write:
\[ 2.788 \times 10^{10} \]
So, \(2.788E10\) in scientific notation is \(2.788 \times 10^{10}\).