MathQuarryCalculators

Primes / Is 428 prime?

Is 428 a Prime Number?

No428 = 2^2 x 107

428 is NOT prime: 2 × 214 = 428. That makes 2 a genuine divisor of 428 beyond 1 and 428 itself. Fully broken down, 428 = 2^2 × 107, for 6 divisors total. 428 sits between primes 421 and 431, 7 below and 3 above. 428: 2, 4 divide 428 evenly, checked against 2-12. 428 is even, digit sum 14 for 428, digital root 5 for 428. 428 has 4 primes within 10 of 428.

Factors
1, 2, 4, 107, 214, 428
Number of factors
6
Prime?
No
Prime factorization
2^2 x 107
Even or odd
Even
Square
183184
Cube
78402752
Binary
110101100
Hexadecimal
1AC
Roman numeral
CDXXVIII
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 428 →Factors of 428 →