The number 47378
47378 is a composite number with 4 divisors. Its prime factorisation is 2 × 23689. Divisors (4): 1, 2, 23689, 47378.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47378: a semiprime: 2 × 23689, the product of two primes.
- 2
47378 is composite. Its prime factorisation is
- 3
The divisors add up to 71070; without 47378 itself that is 23692, so 47378 is deficient (23692 is less than 47378). Euler's totient φ(47378) = 23688 numbers up to 47378 share no factor with it.
- 4
The digits of 47378 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 83 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47378 = 2 \times 23689 \]
47378 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 71070 |
| Euler totient φ(n) | 23688 |
| Square | 2244674884 |
| Cube | 106348206654152 |
| Square root | 217.664880 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 83 |
| Scientific notation | 4.7378 × |
47378 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand three hundred and seventy-eight |
| Binary (base 2) | 1011100100010010 |
| Octal (base 8) | 134422 |
| Hexadecimal (base 16) | B912 |
| Base 3 | 2101222202 |
| As time | 47378 seconds = 13 h 9 min 38 s |
Is 47378 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47378 ÷ 2 = 23689) | 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 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 2) | 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 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47378 a prime number?
No. 47378 = 2 × 23689, so it is divisible by 2.
What are the factors of 47378?
1, 2, 23689, 47378.
What is 47378 in binary?
1011100100010010 (hexadecimal B912, octal 134422).
What is the square root of 47378?
About 217.6649.
Is 47378 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 47378?
47378 is a semiprime: 2 × 23689, the product of two primes.