The number 24890
24890 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 19 × 131. Divisors (16): 1, 2, 5, 10, 19, 38, 95, 131, 190, 262, 655, 1310, 2489, 4978, 12445, 24890.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
24890 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
24890 is composite. Its prime factorisation is
- 3
The divisors add up to 47520; without 24890 itself that is 22630, so 24890 is deficient (22630 is less than 24890). Euler's totient φ(24890) = 9360 numbers up to 24890 share no factor with it.
- 4
The digits of 24890 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 38 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24890 = 2 \times 5 \times 19 \times 131 \]
24890 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 47520 |
| Euler totient φ(n) | 9360 |
| Square | 619512100 |
| Cube | 15419656169000 |
| Square root | 157.765649 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 38 |
| Scientific notation | 2.489 × |
24890 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand eight hundred and ninety |
| Binary (base 2) | 110000100111010 |
| Octal (base 8) | 60472 |
| Hexadecimal (base 16) | 613A |
| Base 3 | 1021010212 |
| As time | 24890 seconds = 6 h 54 min 50 s |
Is 24890 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (24890 ÷ 2 = 12445) | 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 (24890 ÷ 5 = 4978) | 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 5) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (24890 ÷ 10 = 2489) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | 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 24890 a prime number?
No. 24890 = 2 × 5 × 19 × 131, so it is divisible by 2.
What are the factors of 24890?
1, 2, 5, 10, 19, 38, 95, 131, 190, 262, 655, 1310, 2489, 4978, 12445, 24890.
What is 24890 in binary?
110000100111010 (hexadecimal 613A, octal 60472).
What is the square root of 24890?
About 157.7656.
Is 24890 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 24890?
It is a composite number with 16 divisors.