No, 438 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
438 has divisors other than 1 and itself. The smallest is 2: 438 ÷ 2 = 219.
Prime factorization: 438 = 2 × 3 × 73.
| Number | Prime? |
|---|---|
| 434 | No, 2 × 7 × 31 |
| 435 | No, 3 × 5 × 29 |
| 436 | No, 2 × 2 × 109 |
| 437 | No, 19 × 23 |
| 439 | Yes |
| 440 | No, 2 × 2 × 2 × 5 × 11 |
| 441 | No, 3 × 3 × 7 × 7 |
| 442 | No, 2 × 13 × 17 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.