Q: Is 400,400 a Prime Number?
A: No, 400,400 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 400400 can be evenly divided by 1 2 4 5 7 8 10 11 13 14 16 20 22 25 26 28 35 40 44 50 52 55 56 65 70 77 80 88 91 100 104 110 112 130 140 143 154 175 176 182 200 208 220 260 275 280 286 308 325 350 364 385 400 440 455 520 550 560 572 616 650 700 715 728 770 880 910 1,001 1,040 1,100 1,144 1,232 1,300 1,400 1,430 1,456 1,540 1,820 1,925 2,002 2,200 2,275 2,288 2,600 2,800 2,860 3,080 3,575 3,640 3,850 4,004 4,400 4,550 5,005 5,200 5,720 6,160 7,150 7,280 7,700 8,008 9,100 10,010 11,440 14,300 15,400 16,016 18,200 20,020 25,025 28,600 30,800 36,400 40,040 50,050 57,200 80,080 100,100 200,200 and 400,400, with no remainder.
Since 400,400 cannot be divided by just 1 and 400,400, it is not a prime number.