It is clearly and obviously not prime.
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PF of 462 = 2 x 3 x 7 x 11
Since 462 is clearly even (all integers which end with a 0, 2, 4, 6 or 8 are even) it is composite (2 is the only even prime number). All even numbers except for 2 are composite. All prime numbers except for 2 are odd numbers.
You've come to the right place. Here is the answer: 462 = 2 × 3 × 7 × 11
2x21x11
Sum = ½ × number of numbers × (first number + last number) = ½ × (462 - 408 + 1) × (408 + 462) = ½ × 55 × 870 = 23,925