A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9802080 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 180 216 240 270 288 360 432 480 540 720 864 1,080 1,440 2,160 2,269 4,320 4,538 6,807 9,076 11,345 13,614 18,152 20,421 22,690 27,228 34,035 36,304 40,842 45,380 54,456 61,263 68,070 72,608 81,684 90,760 102,105 108,912 122,526 136,140 163,368 181,520 204,210 217,824 245,052 272,280 306,315 326,736 363,040 408,420 490,104 544,560 612,630 653,472 816,840 980,208 1,089,120 1,225,260 1,633,680 1,960,416 2,450,520 3,267,360 4,901,040 and 9,802,080, with no remainder.
Since 9,802,080 cannot be divided by just 1 and 9,802,080, it is not a prime number.