The number 24690
24690 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 5 × 823. Divisors (16): 1, 2, 3, 5, 6, 10, 15, 30, 823, 1646, 2469, 4115, 4938, 8230, 12345, 24690.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
24690 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
24690 is composite. Its prime factorisation is
- 3
The divisors add up to 59328; without 24690 itself that is 34638, so 24690 is abundant (34638 is more than 24690). Euler's totient φ(24690) = 6576 numbers up to 24690 share no factor with it.
- 4
The digits of 24690 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 51 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24690 = 2 \times 3 \times 5 \times 823 \]
24690 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 59328 |
| Euler totient φ(n) | 6576 |
| Square | 609596100 |
| Cube | 15050927709000 |
| Square root | 157.130519 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 51 |
| Scientific notation | 2.469 × |
24690 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand six hundred and ninety |
| Binary (base 2) | 110000001110010 |
| Octal (base 8) | 60162 |
| Hexadecimal (base 16) | 6072 |
| Base 3 | 1020212110 |
| As time | 24690 seconds = 6 h 51 min 30 s |
Is 24690 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (24690 ÷ 2 = 12345) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (24690 ÷ 3 = 8230) | 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 (24690 ÷ 5 = 4938) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (24690 ÷ 6 = 4115) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 (24690 ÷ 10 = 2469) | 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 24690 a prime number?
No. 24690 = 2 × 3 × 5 × 823, so it is divisible by 2.
What are the factors of 24690?
1, 2, 3, 5, 6, 10, 15, 30, 823, 1646, 2469, 4115, 4938, 8230, 12345, 24690.
What is 24690 in binary?
110000001110010 (hexadecimal 6072, octal 60162).
What is the square root of 24690?
About 157.1305.
Is 24690 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 24690?
It is a composite number with 16 divisors.