The number 3618
3618 is a composite number with 16 divisors. Its prime factorisation is 2 × × 67. Divisors (16): 1, 2, 3, 6, 9, 18, 27, 54, 67, 134, 201, 402, 603, 1206, 1809, 3618.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 3618: a Harshad number: divisible by its digit sum 18.
- 2
3618 is composite. Its prime factorisation is
- 3
The divisors add up to 8160; without 3618 itself that is 4542, so 3618 is abundant (4542 is more than 3618). Euler's totient φ(3618) = 1188 numbers up to 3618 share no factor with it.
- 4
The digits of 3618 add up to 18, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 56 steps to reach 1.
LaTeX source of the formulas on this page
\[ 3618 = 2 \times 3^{3} \times 67 \]3618 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 8160 |
| Euler totient φ(n) | 1188 |
| Square | 13089924 |
| Cube | 47359345032 |
| Square root | 60.149813 (= 3√402) |
| Digit sum / digital root | 18 / 9 |
| Collatz steps to 1 | 56 |
| Scientific notation | 3.618 × |
3618 in other forms
| Form | Value |
|---|---|
| In words | three thousand six hundred and eighteen |
| Roman numerals | MMMDCXVIII |
| Binary (base 2) | 111000100010 |
| Octal (base 8) | 7042 |
| Hexadecimal (base 16) | E22 |
| Base 3 | 11222000 |
| As time | 3618 seconds = 1 h 0 min 18 s |
Is 3618 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (3618 ÷ 2 = 1809) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (3618 ÷ 3 = 1206) | 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 | Yes (3618 ÷ 6 = 603) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 | Yes (3618 ÷ 9 = 402) | 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 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 3618 a prime number?
No. 3618 = 2 × × 67, so it is divisible by 2.
What are the factors of 3618?
1, 2, 3, 6, 9, 18, 27, 54, 67, 134, 201, 402, 603, 1206, 1809, 3618.
What is 3618 in binary?
111000100010 (hexadecimal E22, octal 7042).
What is the square root of 3618?
About 60.1498, exactly 3√402.
What is 3618 in Roman numerals?
MMMDCXVIII.
Is 3618 divisible by 3?
Yes. Its digits add up to 18, a multiple of 3.
What is special about the number 3618?
3618 is a Harshad number: divisible by its digit sum 18.