Base | Representation |
---|---|
bin | 110101011011… |
… | …0001101011010 |
3 | 1221201000112201 |
4 | 1222312031122 |
5 | 24132244211 |
6 | 2440200414 |
7 | 460034533 |
oct | 152661532 |
9 | 57630481 |
10 | 28009306 |
11 | 148a0896 |
12 | 946910a |
13 | 5a58b70 |
14 | 3a1168a |
15 | 26d40c1 |
hex | 1ab635a |
28009306 has 48 divisors (see below), whose sum is σ = 50047200. Its totient is φ = 11651040.
The previous prime is 28009301. The next prime is 28009307. The reversal of 28009306 is 60390082.
It is not an unprimeable number, because it can be changed into a prime (28009301) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474705 + ... + 474763.
It is an arithmetic number, because the mean of its divisors is an integer number (1042650).
Almost surely, 228009306 is an apocalyptic number.
28009306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.
28009306 is a deficient number, since it is larger than the sum of its proper divisors (22037894).
28009306 is a wasteful number, since it uses less digits than its factorization.
28009306 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 155 (or 124 counting only the distinct ones).
The product of its (nonzero) digits is 2592, while the sum is 28.
The square root of 28009306 is about 5292.3818834245. The cubic root of 28009306 is about 303.6925345291.
Adding to 28009306 its reverse (60390082), we get a palindrome (88399388).
The spelling of 28009306 in words is "twenty-eight million, nine thousand, three hundred six".
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