True, it is divisible by 1, 2, 4, 8, 349, 698, 1396, 2792
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3924 is divisible by 3 as the digits added together 3+9+2+4=18 is divisible by 3
4 divides 4 (once), but 4 is not divisible by 8. ■
No. The reverse is true, but 12 is divisible by 4 and not by 8.
It is a statement which is true for some sums.
Being divisible by 4, means that it will also be divisible by 2, so that doesn't tell you anything about divisibility by 8. But if you divide the number by 2, and this quotient is divisible by 4, then yes the original number is divisible by 8.