The number 47090
47090 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 17 × 277. Divisors (16): 1, 2, 5, 10, 17, 34, 85, 170, 277, 554, 1385, 2770, 4709, 9418, 23545, 47090.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47090 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47090 is composite. Its prime factorisation is
- 3
The divisors add up to 90072; without 47090 itself that is 42982, so 47090 is deficient (42982 is less than 47090). Euler's totient φ(47090) = 17664 numbers up to 47090 share no factor with it.
- 4
The digits of 47090 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 132 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47090 = 2 \times 5 \times 17 \times 277 \]
47090 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 90072 |
| Euler totient φ(n) | 17664 |
| Square | 2217468100 |
| Cube | 104420572829000 |
| Square root | 217.002304 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 132 |
| Scientific notation | 4.709 × |
47090 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand and ninety |
| Binary (base 2) | 1011011111110010 |
| Octal (base 8) | 133762 |
| Hexadecimal (base 16) | B7F2 |
| Base 3 | 2101121002 |
| As time | 47090 seconds = 13 h 4 min 50 s |
Is 47090 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47090 ÷ 2 = 23545) | 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 (47090 ÷ 5 = 9418) | 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 1) | 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 (47090 ÷ 10 = 4709) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 47090 a prime number?
No. 47090 = 2 × 5 × 17 × 277, so it is divisible by 2.
What are the factors of 47090?
1, 2, 5, 10, 17, 34, 85, 170, 277, 554, 1385, 2770, 4709, 9418, 23545, 47090.
What is 47090 in binary?
1011011111110010 (hexadecimal B7F2, octal 133762).
What is the square root of 47090?
About 217.0023.
Is 47090 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 47090?
It is a composite number with 16 divisors.