Q: Is 1,998,240 a Prime Number?
A: No, 1,998,240 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1998240 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 32 40 46 48 60 69 80 92 96 115 120 138 160 181 184 230 240 276 345 362 368 460 480 543 552 690 724 736 905 920 1,086 1,104 1,380 1,448 1,810 1,840 2,172 2,208 2,715 2,760 2,896 3,620 3,680 4,163 4,344 5,430 5,520 5,792 7,240 8,326 8,688 10,860 11,040 12,489 14,480 16,652 17,376 20,815 21,720 24,978 28,960 33,304 41,630 43,440 49,956 62,445 66,608 83,260 86,880 99,912 124,890 133,216 166,520 199,824 249,780 333,040 399,648 499,560 666,080 999,120 and 1,998,240, with no remainder.
Since 1,998,240 cannot be divided by just 1 and 1,998,240, it is not a prime number.