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Primes / Is 280 prime?

Is 280 a Prime Number?

No280 = 2^3 x 5 x 7

280 is NOT prime: 2 × 140 = 280. That makes 2 a genuine divisor of 280 beyond 1 and 280 itself. Fully broken down, 280 = 2^3 × 5 × 7, for 16 divisors total. 280 sits between primes 277 and 281, 3 below and 1 above. 280: 2, 4, 5, 7, 8, 10 divide 280 evenly, checked against 2-12. 280 is even, digit sum 10 for 280, digital root 1 for 280. 280 has 4 primes within 10 of 280.

Factors
1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280
Number of factors
16
Prime?
No
Prime factorization
2^3 x 5 x 7
Even or odd
Even
Square
78400
Cube
21952000
Binary
100011000
Hexadecimal
118
Roman numeral
CCLXXX
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 280 →Factors of 280 →