It has more than two factors.
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composite and 2*2*7 = 28
factors of 28: 1, 2, 4, 7, 14, 28 composite factors of 28: 4, 14, 28
The composite factors of 28 are 4, 14, 28 The composite factors of 24 are 4, 6, 8, 12, 24
28 is a composite number because it has factors of 2 and 7.
composite: 1, 2, 4, 7, 14, 28