Base | Representation |
---|---|
bin | 11010011000101010… |
… | …101100100101111001 |
3 | 2201010110000200122112 |
4 | 122120222230211321 |
5 | 431010232231210 |
6 | 21003134302105 |
7 | 2022033442166 |
oct | 323052544571 |
9 | 81113020575 |
10 | 28331133305 |
11 | 11019205862 |
12 | 55a8057935 |
13 | 28966c9607 |
14 | 152a94906d |
15 | b0c374d05 |
hex | 698aac979 |
28331133305 has 16 divisors (see below), whose sum is σ = 34645812480. Its totient is φ = 22232778048.
The previous prime is 28331133293. The next prime is 28331133307. The reversal of 28331133305 is 50333113382.
It is a cyclic number.
It is not a de Polignac number, because 28331133305 - 214 = 28331116921 is a prime.
It is a super-2 number, since 2×283311333052 (a number of 22 digits) contains 22 as substring.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (28331133307) 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, 2034356 + ... + 2048234.
It is an arithmetic number, because the mean of its divisors is an integer number (2165363280).
Almost surely, 228331133305 is an apocalyptic number.
It is an amenable number.
28331133305 is a deficient number, since it is larger than the sum of its proper divisors (6314679175).
28331133305 is a wasteful number, since it uses less digits than its factorization.
28331133305 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21640.
The product of its (nonzero) digits is 19440, while the sum is 32.
Adding to 28331133305 its reverse (50333113382), we get a palindrome (78664246687).
The spelling of 28331133305 in words is "twenty-eight billion, three hundred thirty-one million, one hundred thirty-three thousand, three hundred five".
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