The number 18488
18488 is a composite number with 8 divisors. Its prime factorisation is × 2311. Divisors (8): 1, 2, 4, 8, 2311, 4622, 9244, 18488.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18488 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18488 is composite. Its prime factorisation is
- 3
The divisors add up to 34680; without 18488 itself that is 16192, so 18488 is deficient (16192 is less than 18488). Euler's totient φ(18488) = 9240 numbers up to 18488 share no factor with it.
- 4
The digits of 18488 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 154 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18488 = 2^{3} \times 2311 \]18488 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 34680 |
| Euler totient φ(n) | 9240 |
| Square | 341806144 |
| Cube | 6319311990272 |
| Square root | 135.970585 (= 2√4622) |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 154 |
| Scientific notation | 1.8488 × |
18488 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand four hundred and eighty-eight |
| Binary (base 2) | 100100000111000 |
| Octal (base 8) | 44070 |
| Hexadecimal (base 16) | 4838 |
| Base 3 | 221100202 |
| As time | 18488 seconds = 5 h 8 min 8 s |
Is 18488 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18488 ÷ 2 = 9244) | 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 | Yes (18488 ÷ 4 = 4622) | 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 | No (remainder 2) | 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 | Yes (18488 ÷ 8 = 2311) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 18488 a prime number?
No. 18488 = × 2311, so it is divisible by 2.
What are the factors of 18488?
1, 2, 4, 8, 2311, 4622, 9244, 18488.
What is 18488 in binary?
100100000111000 (hexadecimal 4838, octal 44070).
What is the square root of 18488?
About 135.9706, exactly 2√4622.
Is 18488 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 18488?
It is a composite number with 8 divisors.