The number 55839
55839 is a composite number with 8 divisors. Its prime factorisation is 3 × 7 × 2659. Divisors (8): 1, 3, 7, 21, 2659, 7977, 18613, 55839.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55839 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55839 is composite. Its prime factorisation is
- 3
The divisors add up to 85120; without 55839 itself that is 29281, so 55839 is deficient (29281 is less than 55839). Euler's totient φ(55839) = 31896 numbers up to 55839 share no factor with it.
- 4
The digits of 55839 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 91 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55839 = 3 \times 7 \times 2659 \]
55839 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 85120 |
| Euler totient φ(n) | 31896 |
| Square | 3117993921 |
| Cube | 174105662554719 |
| Square root | 236.302772 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 91 |
| Scientific notation | 5.5839 × |
55839 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand eight hundred and thirty-nine |
| Binary (base 2) | 1101101000011111 |
| Octal (base 8) | 155037 |
| Hexadecimal (base 16) | DA1F |
| Base 3 | 2211121010 |
| As time | 55839 seconds = 15 h 30 min 39 s |
Is 55839 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (55839 ÷ 3 = 18613) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (55839 ÷ 7 = 7977) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55839 a prime number?
No. 55839 = 3 × 7 × 2659, so it is divisible by 3.
What are the factors of 55839?
1, 3, 7, 21, 2659, 7977, 18613, 55839.
What is 55839 in binary?
1101101000011111 (hexadecimal DA1F, octal 155037).
What is the square root of 55839?
About 236.3028.
Is 55839 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 55839?
It is a composite number with 8 divisors.