Square Root Calculator › Square root of 404
Square Root of 404
√404 ≈ 20.099751
404 is not a perfect square, so √404 is an irrational number that is approximately 20.099751. In simplified radical form, √404 = 2√101.
√404 lies between √400 = 20 and √441 = 21.
| Number | 404 |
| Square root (decimal) | 20.099751 |
| Simplified radical | 2√101 |
| Perfect square? | No |
| Rational? | No |
Calculate another square root
Nearby square roots
Frequently asked questions
Is 404 a perfect square?
No, 404 is not a perfect square, so its square root is irrational and approximately 20.099751.
What is the square root of 404 in simplest radical form?
√404 = 2√101 in simplest radical form.