The number 64442
64442 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 4603. Divisors (8): 1, 2, 7, 14, 4603, 9206, 32221, 64442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
64442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
64442 is composite. Its prime factorisation is
- 3
The divisors add up to 110496; without 64442 itself that is 46054, so 64442 is deficient (46054 is less than 64442). Euler's totient φ(64442) = 27612 numbers up to 64442 share no factor with it.
- 4
The digits of 64442 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 73 steps to reach 1.
LaTeX source of the formulas on this page
\[ 64442 = 2 \times 7 \times 4603 \]
64442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 110496 |
| Euler totient φ(n) | 27612 |
| Square | 4152771364 |
| Cube | 267612892238888 |
| Square root | 253.854289 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 73 |
| Scientific notation | 6.4442 × |
64442 in other forms
| Form | Value |
|---|---|
| In words | sixty-four thousand four hundred and forty-two |
| Binary (base 2) | 1111101110111010 |
| Octal (base 8) | 175672 |
| Hexadecimal (base 16) | FBBA |
| Base 3 | 10021101202 |
| As time | 64442 seconds = 17 h 54 min 2 s |
Is 64442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (64442 ÷ 2 = 32221) | 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 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 (64442 ÷ 7 = 9206) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 64442 a prime number?
No. 64442 = 2 × 7 × 4603, so it is divisible by 2.
What are the factors of 64442?
1, 2, 7, 14, 4603, 9206, 32221, 64442.
What is 64442 in binary?
1111101110111010 (hexadecimal FBBA, octal 175672).
What is the square root of 64442?
About 253.8543.
Is 64442 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 64442?
It is a composite number with 8 divisors.