Q: Is 553,840 a Prime Number?
A: No, 553,840 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 553840 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 23 28 35 40 43 46 56 70 80 86 92 112 115 140 161 172 184 215 230 280 301 322 344 368 430 460 560 602 644 688 805 860 920 989 1,204 1,288 1,505 1,610 1,720 1,840 1,978 2,408 2,576 3,010 3,220 3,440 3,956 4,816 4,945 6,020 6,440 6,923 7,912 9,890 12,040 12,880 13,846 15,824 19,780 24,080 27,692 34,615 39,560 55,384 69,230 79,120 110,768 138,460 276,920 and 553,840, with no remainder.
Since 553,840 cannot be divided by just 1 and 553,840, it is not a prime number.