Base | Representation |
---|---|
bin | 110101110011… |
… | …0001011001100 |
3 | 1222002000001020 |
4 | 1223212023030 |
5 | 24210041042 |
6 | 2444314140 |
7 | 461513400 |
oct | 153461314 |
9 | 58060036 |
10 | 28205772 |
11 | 14a15461 |
12 | 9542950 |
13 | 5ac740a |
14 | 3a63100 |
15 | 27223ec |
hex | 1ae62cc |
28205772 has 36 divisors (see below), whose sum is σ = 76560120. Its totient is φ = 8058624.
The previous prime is 28205767. The next prime is 28205783. The reversal of 28205772 is 27750282.
It is an unprimeable number.
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 11 ways as a sum of consecutive naturals, for example, 23397 + ... + 24572.
It is an arithmetic number, because the mean of its divisors is an integer number (2126670).
Almost surely, 228205772 is an apocalyptic number.
It is an amenable number.
28205772 is an abundant number, since it is smaller than the sum of its proper divisors (48354348).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28205772 is a wasteful number, since it uses less digits than its factorization.
28205772 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 47990 (or 47981 counting only the distinct ones).
The product of its (nonzero) digits is 15680, while the sum is 33.
The square root of 28205772 is about 5310.9106563752. The cubic root of 28205772 is about 304.4009454529.
The spelling of 28205772 in words is "twenty-eight million, two hundred five thousand, seven hundred seventy-two".
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