The number 55428
55428 is a composite number with 24 divisors. Its prime factorisation is × 3 × 31 × 149. Divisors (24): 1, 2, 3, 4, 6, 12, 31, 62, 93, 124, 149, 186, 298, 372, 447, 596 … 55428.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
55428 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
55428 is composite. Its prime factorisation is
- 3
The divisors add up to 134400; without 55428 itself that is 78972, so 55428 is abundant (78972 is more than 55428). Euler's totient φ(55428) = 17760 numbers up to 55428 share no factor with it.
- 4
The digits of 55428 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 153 steps to reach 1.
LaTeX source of the formulas on this page
\[ 55428 = 2^{2} \times 3 \times 31 \times 149 \]55428 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 134400 |
| Euler totient φ(n) | 17760 |
| Square | 3072263184 |
| Cube | 170289403762752 |
| Square root | 235.431519 (= 2√13857) |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 153 |
| Scientific notation | 5.5428 × |
55428 in other forms
| Form | Value |
|---|---|
| In words | fifty-five thousand four hundred and twenty-eight |
| Binary (base 2) | 1101100010000100 |
| Octal (base 8) | 154204 |
| Hexadecimal (base 16) | D884 |
| Base 3 | 2211000220 |
| As time | 55428 seconds = 15 h 23 min 48 s |
Is 55428 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (55428 ÷ 2 = 27714) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (55428 ÷ 3 = 18476) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (55428 ÷ 4 = 13857) | 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 (55428 ÷ 6 = 9238) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | Yes (55428 ÷ 12 = 4619) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 55428 a prime number?
No. 55428 = × 3 × 31 × 149, so it is divisible by 2.
What are the factors of 55428?
1, 2, 3, 4, 6, 12, 31, 62, 93, 124, 149, 186, 298, 372, 447, 596, 894, 1788, 4619, 9238, 13857, 18476, 27714, 55428.
What is 55428 in binary?
1101100010000100 (hexadecimal D884, octal 154204).
What is the square root of 55428?
About 235.4315, exactly 2√13857.
Is 55428 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 55428?
It is a composite number with 24 divisors.