The number 29990
29990 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 2999. Divisors (8): 1, 2, 5, 10, 2999, 5998, 14995, 29990.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
29990 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
29990 is composite. Its prime factorisation is
- 3
The divisors add up to 54000; without 29990 itself that is 24010, so 29990 is deficient (24010 is less than 29990). Euler's totient φ(29990) = 11992 numbers up to 29990 share no factor with it.
- 4
The digits of 29990 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 64 steps to reach 1.
LaTeX source of the formulas on this page
\[ 29990 = 2 \times 5 \times 2999 \]
29990 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 54000 |
| Euler totient φ(n) | 11992 |
| Square | 899400100 |
| Cube | 26973008999000 |
| Square root | 173.176211 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 64 |
| Scientific notation | 2.999 × |
29990 in other forms
| Form | Value |
|---|---|
| In words | twenty-nine thousand nine hundred and ninety |
| Binary (base 2) | 111010100100110 |
| Octal (base 8) | 72446 |
| Hexadecimal (base 16) | 7526 |
| Base 3 | 1112010202 |
| As time | 29990 seconds = 8 h 19 min 50 s |
Is 29990 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (29990 ÷ 2 = 14995) | 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 (29990 ÷ 5 = 5998) | 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 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 (29990 ÷ 10 = 2999) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | 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 29990 a prime number?
No. 29990 = 2 × 5 × 2999, so it is divisible by 2.
What are the factors of 29990?
1, 2, 5, 10, 2999, 5998, 14995, 29990.
What is 29990 in binary?
111010100100110 (hexadecimal 7526, octal 72446).
What is the square root of 29990?
About 173.1762.
Is 29990 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 29990?
It is a composite number with 8 divisors.