Base | Representation |
---|---|
bin | 100010010101… |
… | …010001010010 |
3 | 121221020201000 |
4 | 202111101102 |
5 | 4301000033 |
6 | 520522430 |
7 | 136333056 |
oct | 42252122 |
9 | 17836630 |
10 | 9000018 |
11 | 5097935 |
12 | 3020416 |
13 | 1b31671 |
14 | 12a3c66 |
15 | bcba13 |
hex | 895452 |
9000018 has 16 divisors (see below), whose sum is σ = 20000160. Its totient is φ = 2999988.
The previous prime is 9000011. The next prime is 9000041. The reversal of 9000018 is 8100009.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is an Ulam number.
It is not an unprimeable number, because it can be changed into a prime (9000011) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83280 + ... + 83387.
It is an arithmetic number, because the mean of its divisors is an integer number (1250010).
Almost surely, 29000018 is an apocalyptic number.
9000018 is an abundant number, since it is smaller than the sum of its proper divisors (11000142).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9000018 is a wasteful number, since it uses less digits than its factorization.
9000018 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 166678 (or 166672 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 18.
The square root of 9000018 is about 3000.0029999985. The cubic root of 9000018 is about 208.0085209774.
Subtracting from 9000018 its sum of digits (18), we obtain a square (9000000 = 30002).
Subtracting from 9000018 its reverse (8100009), we obtain a palindrome (900009).
It can be divided in two parts, 900001 and 8, that added together give a palindrome (900009).
The spelling of 9000018 in words is "nine million, eighteen", and thus it is an aban number and an uban number.
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