The number 77449
77449 is a composite number with 4 divisors. Its prime factorisation is 41 × 1889. Divisors (4): 1, 41, 1889, 77449.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 77449: a semiprime: 41 × 1889, the product of two primes.
- 2
77449 is composite. Its prime factorisation is
- 3
The divisors add up to 79380; without 77449 itself that is 1931, so 77449 is deficient (1931 is less than 77449). Euler's totient φ(77449) = 75520 numbers up to 77449 share no factor with it.
- 4
The digits of 77449 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 200 steps to reach 1.
LaTeX source of the formulas on this page
\[ 77449 = 41 \times 1889 \]
77449 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 79380 |
| Euler totient φ(n) | 75520 |
| Square | 5998347601 |
| Cube | 464566023349849 |
| Square root | 278.296604 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 200 |
| Scientific notation | 7.7449 × |
77449 in other forms
| Form | Value |
|---|---|
| In words | seventy-seven thousand four hundred and forty-nine |
| Binary (base 2) | 10010111010001001 |
| Octal (base 8) | 227211 |
| Hexadecimal (base 16) | 12E89 |
| Base 3 | 10221020111 |
| As time | 77449 seconds = 21 h 30 min 49 s |
Is 77449 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 1) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 77449 a prime number?
No. 77449 = 41 × 1889, so it is divisible by 41.
What are the factors of 77449?
1, 41, 1889, 77449.
What is 77449 in binary?
10010111010001001 (hexadecimal 12E89, octal 227211).
What is the square root of 77449?
About 278.2966.
Is 77449 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 77449?
77449 is a semiprime: 41 × 1889, the product of two primes.