Q: Is 400,820 a Composite Number?
A: Yes, 400,820 is a composite number.
The number 400,820 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 49 70 98 140 196 245 409 490 818 980 1,636 2,045 2,863 4,090 5,726 8,180 11,452 14,315 20,041 28,630 40,082 57,260 80,164 100,205 200,410 and 400,820, with no remainder.
Since 400,820 cannot be divided by just 1 and 400,820, it is a composite number.