The number 16378
16378 is a composite number with 8 divisors. Its prime factorisation is 2 × 19 × 431. Divisors (8): 1, 2, 19, 38, 431, 862, 8189, 16378.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
16378 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
16378 is composite. Its prime factorisation is
- 3
The divisors add up to 25920; without 16378 itself that is 9542, so 16378 is deficient (9542 is less than 16378). Euler's totient φ(16378) = 7740 numbers up to 16378 share no factor with it.
- 4
The digits of 16378 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 159 steps to reach 1.
LaTeX source of the formulas on this page
\[ 16378 = 2 \times 19 \times 431 \]
16378 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 25920 |
| Euler totient φ(n) | 7740 |
| Square | 268238884 |
| Cube | 4393216442152 |
| Square root | 127.976560 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 159 |
| Scientific notation | 1.6378 × |
16378 in other forms
| Form | Value |
|---|---|
| In words | sixteen thousand three hundred and seventy-eight |
| Binary (base 2) | 11111111111010 |
| Octal (base 8) | 37772 |
| Hexadecimal (base 16) | 3FFA |
| Base 3 | 211110121 |
| As time | 16378 seconds = 4 h 32 min 58 s |
Is 16378 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (16378 ÷ 2 = 8189) | 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 3) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 16378 a prime number?
No. 16378 = 2 × 19 × 431, so it is divisible by 2.
What are the factors of 16378?
1, 2, 19, 38, 431, 862, 8189, 16378.
What is 16378 in binary?
11111111111010 (hexadecimal 3FFA, octal 37772).
What is the square root of 16378?
About 127.9766.
Is 16378 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 16378?
It is a composite number with 8 divisors.