The number 77446
77446 is a composite number with 4 divisors. Its prime factorisation is 2 × 38723. Divisors (4): 1, 2, 38723, 77446.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77446: a semiprime: 2 × 38723, the product of two primes.
- 2
77446 is composite. Its prime factorisation is
- 3
The divisors add up to 116172; without 77446 itself that is 38726, so 77446 is deficient (38726 is less than 77446). Euler's totient φ(77446) = 38722 numbers up to 77446 share no factor with it.
- 4
The digits of 77446 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77446 = 2 \times 38723 \]
77446 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 116172 |
| Euler totient φ(n) | 38722 |
| Square | 5997882916 |
| Cube | 464512040312536 |
| Square root | 278.291214 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 76 |
| Scientific notation | 7.7446 × |
77446 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand four hundred and forty-six |
| Binary (base 2) | 10010111010000110 |
| Octal (base 8) | 227206 |
| Hexadecimal (base 16) | 12E86 |
| Base 3 | 10221020101 |
| As time | 77446 seconds = 21 h 30 min 46 s |
Is 77446 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (77446 ÷ 2 = 38723) | 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 1) | 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 5) | 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 1) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 6) | 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 77446 a prime number?
No. 77446 = 2 × 38723, so it is divisible by 2.
What are the factors of 77446?
1, 2, 38723, 77446.
What is 77446 in binary?
10010111010000110 (hexadecimal 12E86, octal 227206).
What is the square root of 77446?
About 278.2912.
Is 77446 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 77446?
77446 is a semiprime: 2 × 38723, the product of two primes.