The number 47690
47690 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 19 × 251. Divisors (16): 1, 2, 5, 10, 19, 38, 95, 190, 251, 502, 1255, 2510, 4769, 9538, 23845, 47690.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47690 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47690 is composite. Its prime factorisation is
- 3
The divisors add up to 90720; without 47690 itself that is 43030, so 47690 is deficient (43030 is less than 47690). Euler's totient φ(47690) = 18000 numbers up to 47690 share no factor with it.
- 4
The digits of 47690 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 52 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47690 = 2 \times 5 \times 19 \times 251 \]
47690 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 90720 |
| Euler totient φ(n) | 18000 |
| Square | 2274336100 |
| Cube | 108463088609000 |
| Square root | 218.380402 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 52 |
| Scientific notation | 4.769 × |
47690 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand six hundred and ninety |
| Binary (base 2) | 1011101001001010 |
| Octal (base 8) | 135112 |
| Hexadecimal (base 16) | BA4A |
| Base 3 | 2102102022 |
| As time | 47690 seconds = 13 h 14 min 50 s |
Is 47690 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47690 ÷ 2 = 23845) | 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 (47690 ÷ 5 = 9538) | 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 6) | 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (47690 ÷ 10 = 4769) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 47690 a prime number?
No. 47690 = 2 × 5 × 19 × 251, so it is divisible by 2.
What are the factors of 47690?
1, 2, 5, 10, 19, 38, 95, 190, 251, 502, 1255, 2510, 4769, 9538, 23845, 47690.
What is 47690 in binary?
1011101001001010 (hexadecimal BA4A, octal 135112).
What is the square root of 47690?
About 218.3804.
Is 47690 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 47690?
It is a composite number with 16 divisors.