Base | Representation |
---|---|
bin | 110111010000… |
… | …0100111111101 |
3 | 2000111210122022 |
4 | 1232200213331 |
5 | 24404010334 |
6 | 2512525525 |
7 | 501144044 |
oct | 156404775 |
9 | 60453568 |
10 | 28969469 |
11 | 15397211 |
12 | 98508a5 |
13 | 6003bc9 |
14 | 3bc155b |
15 | 282382e |
hex | 1ba09fd |
28969469 has 4 divisors (see below), whose sum is σ = 29904000. Its totient is φ = 28034940.
The previous prime is 28969459. The next prime is 28969477. The reversal of 28969469 is 96496982.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96496982 = 2 ⋅48248491.
It is a cyclic number.
It is not a de Polignac number, because 28969469 - 24 = 28969453 is a prime.
It is a super-2 number, since 2×289694692 = 1678460268283922, which contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 28969469.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (28969459) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467219 + ... + 467280.
It is an arithmetic number, because the mean of its divisors is an integer number (7476000).
Almost surely, 228969469 is an apocalyptic number.
It is an amenable number.
28969469 is a deficient number, since it is larger than the sum of its proper divisors (934531).
28969469 is an equidigital number, since it uses as much as digits as its factorization.
28969469 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 934530.
The product of its digits is 1679616, while the sum is 53.
The square root of 28969469 is about 5382.3293284599. The cubic root of 28969469 is about 307.1238275779.
The spelling of 28969469 in words is "twenty-eight million, nine hundred sixty-nine thousand, four hundred sixty-nine".
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