The number 43879
43879 is a composite number with 4 divisors. Its prime factorisation is 11 × 3989. Divisors (4): 1, 11, 3989, 43879.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 43879: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 11 × 3989, the product of two primes.
- 2
43879 is composite. Its prime factorisation is
- 3
The divisors add up to 47880; without 43879 itself that is 4001, so 43879 is deficient (4001 is less than 43879). Euler's totient φ(43879) = 39880 numbers up to 43879 share no factor with it.
- 4
The digits of 43879 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 194 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43879 = 11 \times 3989 \]
43879 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 47880 |
| Euler totient φ(n) | 39880 |
| Square | 1925366641 |
| Cube | 84483162840439 |
| Square root | 209.473149 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 194 |
| Scientific notation | 4.3879 × |
43879 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand eight hundred and seventy-nine |
| Binary (base 2) | 1010101101100111 |
| Octal (base 8) | 125547 |
| Hexadecimal (base 16) | AB67 |
| Base 3 | 2020012011 |
| As time | 43879 seconds = 12 h 11 min 19 s |
Is 43879 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 3) | 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 3) | 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 7) | 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 | Yes (43879 ÷ 11 = 3989) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 43879 a prime number?
No. 43879 = 11 × 3989, so it is divisible by 11.
What are the factors of 43879?
1, 11, 3989, 43879.
What is 43879 in binary?
1010101101100111 (hexadecimal AB67, octal 125547).
What is the square root of 43879?
About 209.4731.
Is 43879 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 43879?
43879 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 11 × 3989, the product of two primes.