The number 77342
77342 is a composite number with 4 divisors. Its prime factorisation is 2 × 38671. Divisors (4): 1, 2, 38671, 77342.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77342: a semiprime: 2 × 38671, the product of two primes.
- 2
77342 is composite. Its prime factorisation is
- 3
The divisors add up to 116016; without 77342 itself that is 38674, so 77342 is deficient (38674 is less than 77342). Euler's totient φ(77342) = 38670 numbers up to 77342 share no factor with it.
- 4
The digits of 77342 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77342 = 2 \times 38671 \]
77342 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 116016 |
| Euler totient φ(n) | 38670 |
| Square | 5981784964 |
| Cube | 462643212685688 |
| Square root | 278.104297 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 76 |
| Scientific notation | 7.7342 × |
77342 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand three hundred and forty-two |
| Binary (base 2) | 10010111000011110 |
| Octal (base 8) | 227036 |
| Hexadecimal (base 16) | 12E1E |
| Base 3 | 10221002112 |
| As time | 77342 seconds = 21 h 29 min 2 s |
Is 77342 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (77342 ÷ 2 = 38671) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | 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 1) | 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 77342 a prime number?
No. 77342 = 2 × 38671, so it is divisible by 2.
What are the factors of 77342?
1, 2, 38671, 77342.
What is 77342 in binary?
10010111000011110 (hexadecimal 12E1E, octal 227036).
What is the square root of 77342?
About 278.1043.
Is 77342 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 77342?
77342 is a semiprime: 2 × 38671, the product of two primes.