The number 28488
28488 is a composite number with 16 divisors. Its prime factorisation is × 3 × 1187. Divisors (16): 1, 2, 3, 4, 6, 8, 12, 24, 1187, 2374, 3561, 4748, 7122, 9496, 14244, 28488.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
28488 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
28488 is composite. Its prime factorisation is
- 3
The divisors add up to 71280; without 28488 itself that is 42792, so 28488 is abundant (42792 is more than 28488). Euler's totient φ(28488) = 9488 numbers up to 28488 share no factor with it.
- 4
The digits of 28488 add up to 30, 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
\[ 28488 = 2^{3} \times 3 \times 1187 \]28488 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 71280 |
| Euler totient φ(n) | 9488 |
| Square | 811566144 |
| Cube | 23119896310272 |
| Square root | 168.783885 (= 2√7122) |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 51 |
| Scientific notation | 2.8488 × |
28488 in other forms
| Form | Value |
|---|---|
| In words | twenty-eight thousand four hundred and eighty-eight |
| Binary (base 2) | 110111101001000 |
| Octal (base 8) | 67510 |
| Hexadecimal (base 16) | 6F48 |
| Base 3 | 1110002010 |
| As time | 28488 seconds = 7 h 54 min 48 s |
Is 28488 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (28488 ÷ 2 = 14244) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (28488 ÷ 3 = 9496) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (28488 ÷ 4 = 7122) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (28488 ÷ 6 = 4748) | 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 | Yes (28488 ÷ 8 = 3561) | 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 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | Yes (28488 ÷ 12 = 2374) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 28488 a prime number?
No. 28488 = × 3 × 1187, so it is divisible by 2.
What are the factors of 28488?
1, 2, 3, 4, 6, 8, 12, 24, 1187, 2374, 3561, 4748, 7122, 9496, 14244, 28488.
What is 28488 in binary?
110111101001000 (hexadecimal 6F48, octal 67510).
What is the square root of 28488?
About 168.7839, exactly 2√7122.
Is 28488 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 28488?
It is a composite number with 16 divisors.