The number 290
290 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 29. Divisors (8): 1, 2, 5, 10, 29, 58, 145, 290.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
290 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
290 is composite. Its prime factorisation is
- 3
The divisors add up to 540; without 290 itself that is 250, so 290 is deficient (250 is less than 290). Euler's totient φ(290) = 112 numbers up to 290 share no factor with it.
- 4
The digits of 290 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 117 steps to reach 1.
LaTeX source of the formulas on this page
\[ 290 = 2 \times 5 \times 29 \]
290 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 540 |
| Euler totient φ(n) | 112 |
| Square | 84100 |
| Cube | 24389000 |
| Square root | 17.029386 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 117 |
| Scientific notation | 2.9 × |
290 in other forms
| Form | Value |
|---|---|
| In words | two hundred and ninety |
| Roman numerals | CCXC |
| Binary (base 2) | 100100010 |
| Octal (base 8) | 442 |
| Hexadecimal (base 16) | 122 |
| Base 3 | 101202 |
| As time | 290 seconds = 4 min 50 s |
Is 290 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (290 ÷ 2 = 145) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (290 ÷ 5 = 58) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (290 ÷ 10 = 29) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 290 a prime number?
No. 290 = 2 × 5 × 29, so it is divisible by 2.
What are the factors of 290?
1, 2, 5, 10, 29, 58, 145, 290.
What is 290 in binary?
100100010 (hexadecimal 122, octal 442).
What is the square root of 290?
About 17.0294.
What is 290 in Roman numerals?
CCXC.
Is 290 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 290?
It is a composite number with 8 divisors.