The number 49989
49989 is a composite number with 8 divisors. Its prime factorisation is 3 × 19 × 877. Divisors (8): 1, 3, 19, 57, 877, 2631, 16663, 49989.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
49989 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
49989 is composite. Its prime factorisation is
- 3
The divisors add up to 70240; without 49989 itself that is 20251, so 49989 is deficient (20251 is less than 49989). Euler's totient φ(49989) = 31536 numbers up to 49989 share no factor with it.
- 4
The digits of 49989 add up to 39, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 158 steps to reach 1.
LaTeX source of the formulas on this page
\[ 49989 = 3 \times 19 \times 877 \]
49989 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 70240 |
| Euler totient φ(n) | 31536 |
| Square | 2498900121 |
| Cube | 124917518148669 |
| Square root | 223.582200 |
| Digit sum / digital root | 39 / 3 |
| Collatz steps to 1 | 158 |
| Scientific notation | 4.9989 × |
49989 in other forms
| Form | Value |
|---|---|
| In words | forty-nine thousand nine hundred and eighty-nine |
| Binary (base 2) | 1100001101000101 |
| Octal (base 8) | 141505 |
| Hexadecimal (base 16) | C345 |
| Base 3 | 2112120110 |
| As time | 49989 seconds = 13 h 53 min 9 s |
Is 49989 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 (49989 ÷ 3 = 16663) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 | No (remainder 2) | 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 5) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 49989 a prime number?
No. 49989 = 3 × 19 × 877, so it is divisible by 3.
What are the factors of 49989?
1, 3, 19, 57, 877, 2631, 16663, 49989.
What is 49989 in binary?
1100001101000101 (hexadecimal C345, octal 141505).
What is the square root of 49989?
About 223.5822.
Is 49989 divisible by 3?
Yes. Its digits add up to 39, a multiple of 3.
What is special about the number 49989?
It is a composite number with 8 divisors.