The number 40790
40790 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 4079. Divisors (8): 1, 2, 5, 10, 4079, 8158, 20395, 40790.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40790 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40790 is composite. Its prime factorisation is
- 3
The divisors add up to 73440; without 40790 itself that is 32650, so 40790 is deficient (32650 is less than 40790). Euler's totient φ(40790) = 16312 numbers up to 40790 share no factor with it.
- 4
The digits of 40790 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 88 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40790 = 2 \times 5 \times 4079 \]
40790 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 73440 |
| Euler totient φ(n) | 16312 |
| Square | 1663824100 |
| Cube | 67867385039000 |
| Square root | 201.965344 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 88 |
| Scientific notation | 4.079 × |
40790 in other forms
| Form | Value |
|---|---|
| In words | forty thousand seven hundred and ninety |
| Binary (base 2) | 1001111101010110 |
| Octal (base 8) | 117526 |
| Hexadecimal (base 16) | 9F56 |
| Base 3 | 2001221202 |
| As time | 40790 seconds = 11 h 19 min 50 s |
Is 40790 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (40790 ÷ 2 = 20395) | 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 | Yes (40790 ÷ 5 = 8158) | 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 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 6) | 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 | Yes (40790 ÷ 10 = 4079) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | 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 40790 a prime number?
No. 40790 = 2 × 5 × 4079, so it is divisible by 2.
What are the factors of 40790?
1, 2, 5, 10, 4079, 8158, 20395, 40790.
What is 40790 in binary?
1001111101010110 (hexadecimal 9F56, octal 117526).
What is the square root of 40790?
About 201.9653.
Is 40790 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 40790?
It is a composite number with 8 divisors.