No, 478 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
478 has divisors other than 1 and itself. The smallest is 2: 478 ÷ 2 = 239.
Prime factorization: 478 = 2 × 239.
| Number | Prime? |
|---|---|
| 474 | No, 2 × 3 × 79 |
| 475 | No, 5 × 5 × 19 |
| 476 | No, 2 × 2 × 7 × 17 |
| 477 | No, 3 × 3 × 53 |
| 479 | Yes |
| 480 | No, 2 × 2 × 2 × 2 × 2 × 3 × 5 |
| 481 | No, 13 × 37 |
| 482 | No, 2 × 241 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.