The number 3818
3818 is a composite number with 8 divisors. Its prime factorisation is 2 × 23 × 83. Divisors (8): 1, 2, 23, 46, 83, 166, 1909, 3818.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
3818 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
3818 is composite. Its prime factorisation is
- 3
The divisors add up to 6048; without 3818 itself that is 2230, so 3818 is deficient (2230 is less than 3818). Euler's totient φ(3818) = 1804 numbers up to 3818 share no factor with it.
- 4
The digits of 3818 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 38 steps to reach 1.
LaTeX source of the formulas on this page
\[ 3818 = 2 \times 23 \times 83 \]
3818 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 6048 |
| Euler totient φ(n) | 1804 |
| Square | 14577124 |
| Cube | 55655459432 |
| Square root | 61.789967 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 38 |
| Scientific notation | 3.818 × |
3818 in other forms
| Form | Value |
|---|---|
| In words | three thousand eight hundred and eighteen |
| Roman numerals | MMMDCCCXVIII |
| Binary (base 2) | 111011101010 |
| Octal (base 8) | 7352 |
| Hexadecimal (base 16) | EEA |
| Base 3 | 12020102 |
| As time | 3818 seconds = 1 h 3 min 38 s |
Is 3818 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (3818 ÷ 2 = 1909) | 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 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 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 3818 a prime number?
No. 3818 = 2 × 23 × 83, so it is divisible by 2.
What are the factors of 3818?
1, 2, 23, 46, 83, 166, 1909, 3818.
What is 3818 in binary?
111011101010 (hexadecimal EEA, octal 7352).
What is the square root of 3818?
About 61.7900.
What is 3818 in Roman numerals?
MMMDCCCXVIII.
Is 3818 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 3818?
It is a composite number with 8 divisors.