Base | Representation |
---|---|
bin | 110101110111… |
… | …0001011010000 |
3 | 1222010200000000 |
4 | 1223232023100 |
5 | 24212113134 |
6 | 2445130000 |
7 | 462011055 |
oct | 153561320 |
9 | 58120000 |
10 | 28238544 |
11 | 14a38044 |
12 | 9559900 |
13 | 5b092c9 |
14 | 3a7102c |
15 | 272be99 |
hex | 1aee2d0 |
28238544 has 90 divisors (see below), whose sum is σ = 82369170. Its totient is φ = 9377856.
The previous prime is 28238537. The next prime is 28238563. The reversal of 28238544 is 44583282.
28238544 is a `hidden beast` number, since 2 + 82 + 38 + 544 = 666.
It can be written as a sum of positive squares in only one way, i.e., 17740944 + 10497600 = 4212^2 + 3240^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 28238499 and 28238508.
It is a congruent number.
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 17 ways as a sum of consecutive naturals, for example, 104842 + ... + 105110.
It is an arithmetic number, because the mean of its divisors is an integer number (915213).
It is a vampire number, since it can be written as 4842 ⋅ 5832 (with its own digits).
Almost surely, 228238544 is an apocalyptic number.
28238544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28238544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41184585).
28238544 is an abundant number, since it is smaller than the sum of its proper divisors (54130626).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28238544 is an frugal number, since it uses more digits than its factorization.
28238544 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 301 (or 274 counting only the distinct ones).
The product of its digits is 61440, while the sum is 36.
The square root of 28238544 is about 5313.9951072616. The cubic root of 28238544 is about 304.5187932782.
It can be divided in two parts, 28238 and 544, that added together give a palindrome (28782).
The spelling of 28238544 in words is "twenty-eight million, two hundred thirty-eight thousand, five hundred forty-four".
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