| Base | Representation |
|---|---|
| bin | 1001000110100… |
| … | …1110001111001 |
| 3 | 2122211211212111 |
| 4 | 2101221301321 |
| 5 | 34233311014 |
| 6 | 3442212321 |
| 7 | 642353545 |
| oct | 221516171 |
| 9 | 78754774 |
| 10 | 38182009 |
| 11 | 1a609788 |
| 12 | 109540a1 |
| 13 | 7bab208 |
| 14 | 50dca25 |
| 15 | 35432c4 |
| hex | 2469c79 |
38182009 has 4 divisors (see below), whose sum is σ = 39498660. Its totient is φ = 36865360.
The previous prime is 38182007. The next prime is 38182019. The reversal of 38182009 is 90028183.
38182009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90028183 = 7 ⋅12861169.
It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 12981609 = 5020^2 + 3603^2 .
It is a cyclic number.
It is not a de Polignac number, because 38182009 - 21 = 38182007 is a prime.
It is a super-2 number, since 2×381820092 = 2915731622552162, which contains 22 as substring.
It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (38182007) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658282 + ... + 658339.
It is an arithmetic number, because the mean of its divisors is an integer number (9874665).
Almost surely, 238182009 is an apocalyptic number.
It is an amenable number.
38182009 is a deficient number, since it is larger than the sum of its proper divisors (1316651).
38182009 is a wasteful number, since it uses less digits than its factorization.
38182009 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1316650.
The product of its (nonzero) digits is 3456, while the sum is 31.
The square root of 38182009 is about 6179.1592470173. The cubic root of 38182009 is about 336.7334489398.
The spelling of 38182009 in words is "thirty-eight million, one hundred eighty-two thousand, nine".
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