Base | Representation |
---|---|
bin | 110111000010… |
… | …0111000111101 |
3 | 2000022000210220 |
4 | 1232010320331 |
5 | 24341341434 |
6 | 2510251553 |
7 | 500161620 |
oct | 156047075 |
9 | 60260726 |
10 | 28855869 |
11 | 15319929 |
12 | 97b6bb9 |
13 | 5c942a3 |
14 | 3b91db7 |
15 | 27eed49 |
hex | 1b84e3d |
28855869 has 16 divisors (see below), whose sum is σ = 45883392. Its totient is φ = 15771888.
The previous prime is 28855861. The next prime is 28855873. The reversal of 28855869 is 96855882.
It is not a de Polignac number, because 28855869 - 23 = 28855861 is a prime.
It is a super-2 number, since 2×288558692 = 1665322351490322, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (28855861) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29389 + ... + 30354.
It is an arithmetic number, because the mean of its divisors is an integer number (2867712).
Almost surely, 228855869 is an apocalyptic number.
It is an amenable number.
28855869 is a deficient number, since it is larger than the sum of its proper divisors (17027523).
28855869 is a wasteful number, since it uses less digits than its factorization.
28855869 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 59776.
The product of its digits is 1382400, while the sum is 51.
The square root of 28855869 is about 5371.7659107597. The cubic root of 28855869 is about 306.7218529910.
The spelling of 28855869 in words is "twenty-eight million, eight hundred fifty-five thousand, eight hundred sixty-nine".
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