The number 40489
40489 is a composite number with 4 divisors. Its prime factorisation is 19 × 2131. Divisors (4): 1, 19, 2131, 40489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40489: a semiprime: 19 × 2131, the product of two primes.
- 2
40489 is composite. Its prime factorisation is
- 3
The divisors add up to 42640; without 40489 itself that is 2151, so 40489 is deficient (2151 is less than 40489). Euler's totient φ(40489) = 38340 numbers up to 40489 share no factor with it.
- 4
The digits of 40489 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 212 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40489 = 19 \times 2131 \]
40489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 42640 |
| Euler totient φ(n) | 38340 |
| Square | 1639359121 |
| Cube | 66376011450169 |
| Square root | 201.218786 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 212 |
| Scientific notation | 4.0489 × |
40489 in other forms
| Form | Value |
|---|---|
| In words | forty thousand four hundred and eighty-nine |
| Binary (base 2) | 1001111000101001 |
| Octal (base 8) | 117051 |
| Hexadecimal (base 16) | 9E29 |
| Base 3 | 2001112121 |
| As time | 40489 seconds = 11 h 14 min 49 s |
Is 40489 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 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 1) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40489 a prime number?
No. 40489 = 19 × 2131, so it is divisible by 19.
What are the factors of 40489?
1, 19, 2131, 40489.
What is 40489 in binary?
1001111000101001 (hexadecimal 9E29, octal 117051).
What is the square root of 40489?
About 201.2188.
Is 40489 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 40489?
40489 is a semiprime: 19 × 2131, the product of two primes.