The number 4990
4990 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 499. Divisors (8): 1, 2, 5, 10, 499, 998, 2495, 4990.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
4990 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
4990 is composite. Its prime factorisation is
- 3
The divisors add up to 9000; without 4990 itself that is 4010, so 4990 is deficient (4010 is less than 4990). Euler's totient φ(4990) = 1992 numbers up to 4990 share no factor with it.
- 4
The digits of 4990 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 72 steps to reach 1.
LaTeX source of the formulas on this page
\[ 4990 = 2 \times 5 \times 499 \]
4990 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 9000 |
| Euler totient φ(n) | 1992 |
| Square | 24900100 |
| Cube | 124251499000 |
| Square root | 70.639932 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 72 |
| Scientific notation | 4.99 × |
4990 in other forms
| Form | Value |
|---|---|
| In words | four thousand nine hundred and ninety |
| Binary (base 2) | 1001101111110 |
| Octal (base 8) | 11576 |
| Hexadecimal (base 16) | 137E |
| Base 3 | 20211211 |
| As time | 4990 seconds = 1 h 23 min 10 s |
Is 4990 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (4990 ÷ 2 = 2495) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 (4990 ÷ 5 = 998) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (4990 ÷ 10 = 499) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 4990 a prime number?
No. 4990 = 2 × 5 × 499, so it is divisible by 2.
What are the factors of 4990?
1, 2, 5, 10, 499, 998, 2495, 4990.
What is 4990 in binary?
1001101111110 (hexadecimal 137E, octal 11576).
What is the square root of 4990?
About 70.6399.
Is 4990 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 4990?
It is a composite number with 8 divisors.