The number 758,880 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 30 31 32 34 36 40 45 48 51 60 62 68 72 80 85 90 93 96 102 120 124 136 144 153 155 160 170 180 186 204 240 248 255 272 279 288 306 310 340 360 372 408 465 480 496 510 527 544 558 612 620 680 720 744 765 816 930 992 1,020 1,054 1,116 1,224 1,240 1,360 1,395 1,440 1,488 1,530 1,581 1,632 1,860 2,040 2,108 2,232 2,448 2,480 2,635 2,720 2,790 2,976 3,060 3,162 3,720 4,080 4,216 4,464 4,743 4,896 4,960 5,270 5,580 6,120 6,324 7,440 7,905 8,160 8,432 8,928 9,486 10,540 11,160 12,240 12,648 14,880 15,810 16,864 18,972 21,080 22,320 23,715 24,480 25,296 31,620 37,944 42,160 44,640 47,430 50,592 63,240 75,888 84,320 94,860 126,480 151,776 189,720 252,960 379,440 and 758,880, with no remainder.
Since 758,880 cannot be divided by just 1 and 758,880, it is a composite number.