The number 16439
16439 is a composite number with 4 divisors. Its prime factorisation is 17 × 967. Divisors (4): 1, 17, 967, 16439.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 16439: a semiprime: 17 × 967, the product of two primes.
- 2
16439 is composite. Its prime factorisation is
- 3
The divisors add up to 17424; without 16439 itself that is 985, so 16439 is deficient (985 is less than 16439). Euler's totient φ(16439) = 15456 numbers up to 16439 share no factor with it.
- 4
The digits of 16439 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 190 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16439 = 17 \times 967 \]
16439 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 17424 |
| Euler totient φ(n) | 15456 |
| Square | 270240721 |
| Cube | 4442487212519 |
| Square root | 128.214664 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 190 |
| Scientific notation | 1.6439 × |
16439 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand four hundred and thirty-nine |
| Binary (base 2) | 100000000110111 |
| Octal (base 8) | 40067 |
| Hexadecimal (base 16) | 4037 |
| Base 3 | 211112212 |
| As time | 16439 seconds = 4 h 33 min 59 s |
Is 16439 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 2) | 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 5) | 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 5) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 16439 a prime number?
No. 16439 = 17 × 967, so it is divisible by 17.
What are the factors of 16439?
1, 17, 967, 16439.
What is 16439 in binary?
100000000110111 (hexadecimal 4037, octal 40067).
What is the square root of 16439?
About 128.2147.
Is 16439 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 16439?
16439 is a semiprime: 17 × 967, the product of two primes.