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Primes / Is 400 prime?

Is 400 a Prime Number?

No400 = 2^4 x 5^2

400 is NOT prime: 2 × 200 = 400. That makes 2 a genuine divisor of 400 beyond 1 and 400 itself. Fully broken down, 400 = 2^4 × 5^2, for 15 divisors total. 400 sits between primes 397 and 401, 3 below and 1 above. 400: 2, 4, 5, 8, 10 divide 400 evenly, checked against 2-12. 400 is even, digit sum 4 for 400, digital root 4 for 400. 400 has 3 primes within 10 of 400.

Factors
1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400
Number of factors
15
Prime?
No
Prime factorization
2^4 x 5^2
Even or odd
Even
Square
160000
Cube
64000000
Binary
110010000
Hexadecimal
190
Roman numeral
CD
Perfect square?
Yes
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 400 →Factors of 400 →