Q: Is 276,640 a Prime Number?
A: No, 276,640 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 276640 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 19 20 26 28 32 35 38 40 52 56 65 70 76 80 91 95 104 112 130 133 140 152 160 182 190 208 224 247 260 266 280 304 364 380 416 455 494 520 532 560 608 665 728 760 910 988 1,040 1,064 1,120 1,235 1,330 1,456 1,520 1,729 1,820 1,976 2,080 2,128 2,470 2,660 2,912 3,040 3,458 3,640 3,952 4,256 4,940 5,320 6,916 7,280 7,904 8,645 9,880 10,640 13,832 14,560 17,290 19,760 21,280 27,664 34,580 39,520 55,328 69,160 138,320 and 276,640, with no remainder.
Since 276,640 cannot be divided by just 1 and 276,640, it is not a prime number.