The temperature of the sun at its center, given as \( 2.7 \times 10^7 \) degrees Fahrenheit, can be converted to decimal notation by multiplying 2.7 by 10 raised to the power of 7.
Calculating this:
\[ 2.7 \times 10^7 = 2.7 \times 10000000 = 27000000 \]
Therefore, the temperature of the sun at its center in decimal notation is 27,000,000 degrees Fahrenheit.