The number 2,500,400 can be evenly divided by 1 2 4 5 7 8 10 14 16 19 20 25 28 35 38 40 47 50 56 70 76 80 94 95 100 112 133 140 152 175 188 190 200 235 266 280 304 329 350 376 380 400 470 475 532 560 658 665 700 752 760 893 940 950 1,064 1,175 1,316 1,330 1,400 1,520 1,645 1,786 1,880 1,900 2,128 2,350 2,632 2,660 2,800 3,290 3,325 3,572 3,760 3,800 4,465 4,700 5,264 5,320 6,251 6,580 6,650 7,144 7,600 8,225 8,930 9,400 10,640 12,502 13,160 13,300 14,288 16,450 17,860 18,800 22,325 25,004 26,320 26,600 31,255 32,900 35,720 44,650 50,008 53,200 62,510 65,800 71,440 89,300 100,016 125,020 131,600 156,275 178,600 250,040 312,550 357,200 500,080 625,100 1,250,200 and 2,500,400, with no remainder.
Since 2,500,400 cannot be divided by just 1 and 2,500,400, it is a composite number.