The number 4890
4890 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 5 × 163. Divisors (16): 1, 2, 3, 5, 6, 10, 15, 30, 163, 326, 489, 815, 978, 1630, 2445, 4890.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
4890 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
4890 is composite. Its prime factorisation is
- 3
The divisors add up to 11808; without 4890 itself that is 6918, so 4890 is abundant (6918 is more than 4890). Euler's totient φ(4890) = 1296 numbers up to 4890 share no factor with it.
- 4
The digits of 4890 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 41 steps to reach 1.
LaTeX source of the formulas on this page
\[ 4890 = 2 \times 3 \times 5 \times 163 \]
4890 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 11808 |
| Euler totient φ(n) | 1296 |
| Square | 23912100 |
| Cube | 116930169000 |
| Square root | 69.928535 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 41 |
| Scientific notation | 4.89 × |
4890 in other forms
| Form | Value |
|---|---|
| In words | four thousand eight hundred and ninety |
| Binary (base 2) | 1001100011010 |
| Octal (base 8) | 11432 |
| Hexadecimal (base 16) | 131A |
| Base 3 | 20201010 |
| As time | 4890 seconds = 1 h 21 min 30 s |
Is 4890 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (4890 ÷ 2 = 2445) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (4890 ÷ 3 = 1630) | 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 (4890 ÷ 5 = 978) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (4890 ÷ 6 = 815) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (4890 ÷ 10 = 489) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 4890 a prime number?
No. 4890 = 2 × 3 × 5 × 163, so it is divisible by 2.
What are the factors of 4890?
1, 2, 3, 5, 6, 10, 15, 30, 163, 326, 489, 815, 978, 1630, 2445, 4890.
What is 4890 in binary?
1001100011010 (hexadecimal 131A, octal 11432).
What is the square root of 4890?
About 69.9285.
Is 4890 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 4890?
It is a composite number with 16 divisors.