MathQuarryCalculators

Primes / Is 40 prime?

Is 40 a Prime Number?

No40 = 2^3 x 5

40 is NOT prime: 2 × 20 = 40. That makes 2 a genuine divisor of 40 beyond 1 and 40 itself. Fully broken down, 40 = 2^3 × 5, for 8 divisors total. 40 sits between primes 37 and 41, 3 below and 1 above. 40: 2, 4, 5, 8, 10 divide 40 evenly, checked against 2-12. 40 is even, digit sum 4 for 40, digital root 4 for 40. 40 has 5 primes within 10 of 40.

Factors
1, 2, 4, 5, 8, 10, 20, 40
Number of factors
8
Prime?
No
Prime factorization
2^3 x 5
Even or odd
Even
Square
1600
Cube
64000
Binary
101000
Hexadecimal
28
Roman numeral
XL
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 40 →Factors of 40 →