The number 57428
57428 is a composite number with 18 divisors. Its prime factorisation is × × 293. Divisors (18): 1, 2, 4, 7, 14, 28, 49, 98, 196, 293, 586, 1172, 2051, 4102, 8204, 14357 … 57428.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
57428 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
57428 is composite. Its prime factorisation is
- 3
The divisors add up to 117306; without 57428 itself that is 59878, so 57428 is abundant (59878 is more than 57428). Euler's totient φ(57428) = 24528 numbers up to 57428 share no factor with it.
- 4
The digits of 57428 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 73 steps to reach 1.
LaTeX source of the formulas on this page
\[ 57428 = 2^{2} \times 7^{2} \times 293 \]57428 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 18 |
| Sum of divisors | 117306 |
| Euler totient φ(n) | 24528 |
| Square | 3297975184 |
| Cube | 189396118866752 |
| Square root | 239.641399 (= 14√293) |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 73 |
| Scientific notation | 5.7428 × |
57428 in other forms
| Form | Value |
|---|---|
| In words | fifty-seven thousand four hundred and twenty-eight |
| Binary (base 2) | 1110000001010100 |
| Octal (base 8) | 160124 |
| Hexadecimal (base 16) | E054 |
| Base 3 | 2220202222 |
| As time | 57428 seconds = 15 h 57 min 8 s |
Is 57428 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (57428 ÷ 2 = 28714) | 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 (57428 ÷ 4 = 14357) | 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 | Yes (57428 ÷ 7 = 8204) | 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 8) | 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 57428 a prime number?
No. 57428 = × × 293, so it is divisible by 2.
What are the factors of 57428?
1, 2, 4, 7, 14, 28, 49, 98, 196, 293, 586, 1172, 2051, 4102, 8204, 14357, 28714, 57428.
What is 57428 in binary?
1110000001010100 (hexadecimal E054, octal 160124).
What is the square root of 57428?
About 239.6414, exactly 14√293.
Is 57428 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 57428?
It is a composite number with 18 divisors.