The number 61188
61188 is a composite number with 12 divisors. Its prime factorisation is × 3 × 5099. Divisors (12): 1, 2, 3, 4, 6, 12, 5099, 10198, 15297, 20396, 30594, 61188.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61188 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61188 is composite. Its prime factorisation is
- 3
The divisors add up to 142800; without 61188 itself that is 81612, so 61188 is abundant (81612 is more than 61188). Euler's totient φ(61188) = 20392 numbers up to 61188 share no factor with it.
- 4
The digits of 61188 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 117 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61188 = 2^{2} \times 3 \times 5099 \]61188 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 142800 |
| Euler totient φ(n) | 20392 |
| Square | 3743971344 |
| Cube | 229086118596672 |
| Square root | 247.362083 (= 2√15297) |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 117 |
| Scientific notation | 6.1188 × |
61188 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand one hundred and eighty-eight |
| Binary (base 2) | 1110111100000100 |
| Octal (base 8) | 167404 |
| Hexadecimal (base 16) | EF04 |
| Base 3 | 10002221020 |
| As time | 61188 seconds = 16 h 59 min 48 s |
Is 61188 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61188 ÷ 2 = 30594) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (61188 ÷ 3 = 20396) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (61188 ÷ 4 = 15297) | 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 (61188 ÷ 6 = 10198) | 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 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | Yes (61188 ÷ 12 = 5099) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61188 a prime number?
No. 61188 = × 3 × 5099, so it is divisible by 2.
What are the factors of 61188?
1, 2, 3, 4, 6, 12, 5099, 10198, 15297, 20396, 30594, 61188.
What is 61188 in binary?
1110111100000100 (hexadecimal EF04, octal 167404).
What is the square root of 61188?
About 247.3621, exactly 2√15297.
Is 61188 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 61188?
It is a composite number with 12 divisors.