The number 79442
79442 is a composite number with 16 divisors. Its prime factorisation is 2 × 11 × 23 × 157. Divisors (16): 1, 2, 11, 22, 23, 46, 157, 253, 314, 506, 1727, 3454, 3611, 7222, 39721, 79442.
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How to work it out
- 1
79442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
79442 is composite. Its prime factorisation is
- 3
The divisors add up to 136512; without 79442 itself that is 57070, so 79442 is deficient (57070 is less than 79442). Euler's totient φ(79442) = 34320 numbers up to 79442 share no factor with it.
- 4
The digits of 79442 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 120 steps to reach 1.
LaTeX source of the formulas on this page
\[ 79442 = 2 \times 11 \times 23 \times 157 \]
79442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 136512 |
| Euler totient φ(n) | 34320 |
| Square | 6311031364 |
| Cube | 501360953618888 |
| Square root | 281.854572 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 120 |
| Scientific notation | 7.9442 × |
79442 in other forms
| Form | Value |
|---|---|
| In words | seventy-nine thousand four hundred and forty-two |
| Binary (base 2) | 10011011001010010 |
| Octal (base 8) | 233122 |
| Hexadecimal (base 16) | 13652 |
| Base 3 | 11000222022 |
| As time | 79442 seconds = 22 h 4 min 2 s |
Is 79442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (79442 ÷ 2 = 39721) | 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 | No (remainder 6) | 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 8) | 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 | Yes (79442 ÷ 11 = 7222) | 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 79442 a prime number?
No. 79442 = 2 × 11 × 23 × 157, so it is divisible by 2.
What are the factors of 79442?
1, 2, 11, 22, 23, 46, 157, 253, 314, 506, 1727, 3454, 3611, 7222, 39721, 79442.
What is 79442 in binary?
10011011001010010 (hexadecimal 13652, octal 233122).
What is the square root of 79442?
About 281.8546.
Is 79442 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 79442?
It is a composite number with 16 divisors.