The number 77422
77422 is a composite number with 4 divisors. Its prime factorisation is 2 × 38711. Divisors (4): 1, 2, 38711, 77422.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77422: a semiprime: 2 × 38711, the product of two primes.
- 2
77422 is composite. Its prime factorisation is
- 3
The divisors add up to 116136; without 77422 itself that is 38714, so 77422 is deficient (38714 is less than 77422). Euler's totient φ(77422) = 38710 numbers up to 77422 share no factor with it.
- 4
The digits of 77422 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 125 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77422 = 2 \times 38711 \]
77422 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 116136 |
| Euler totient φ(n) | 38710 |
| Square | 5994166084 |
| Cube | 464080326555448 |
| Square root | 278.248091 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 125 |
| Scientific notation | 7.7422 × |
77422 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand four hundred and twenty-two |
| Binary (base 2) | 10010111001101110 |
| Octal (base 8) | 227156 |
| Hexadecimal (base 16) | 12E6E |
| Base 3 | 10221012111 |
| As time | 77422 seconds = 21 h 30 min 22 s |
Is 77422 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (77422 ÷ 2 = 38711) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 4) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 77422 a prime number?
No. 77422 = 2 × 38711, so it is divisible by 2.
What are the factors of 77422?
1, 2, 38711, 77422.
What is 77422 in binary?
10010111001101110 (hexadecimal 12E6E, octal 227156).
What is the square root of 77422?
About 278.2481.
Is 77422 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 77422?
77422 is a semiprime: 2 × 38711, the product of two primes.