| Base | Representation |
|---|---|
| bin | 110011111010… |
| … | …101100000000 |
| 3 | 221121110001000 |
| 4 | 303322230000 |
| 5 | 11441002403 |
| 6 | 1203412000 |
| 7 | 223452336 |
| oct | 63725400 |
| 9 | 27543030 |
| 10 | 13609728 |
| 11 | 7756210 |
| 12 | 4684000 |
| 13 | 2a868c2 |
| 14 | 1b43b56 |
| 15 | 12dc7a3 |
| hex | cfab00 |
13609728 has 144 divisors (see below), whose sum is σ = 44150400. Its totient is φ = 4101120.
The previous prime is 13609723. The next prime is 13609733. The reversal of 13609728 is 82790631.
It is an interprime number because it is at equal distance from previous prime (13609723) and next prime (13609733).
It is a tau number, because it is divible by the number of its divisors (144).
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 = 13609692 and 13609701.
It is not an unprimeable number, because it can be changed into a prime (13609723) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75943 + ... + 76121.
It is an arithmetic number, because the mean of its divisors is an integer number (306600).
Almost surely, 213609728 is an apocalyptic number.
13609728 is a gapful number since it is divisible by the number (18) 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 13609728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22075200).
13609728 is an abundant number, since it is smaller than the sum of its proper divisors (30540672).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13609728 is a wasteful number, since it uses less digits than its factorization.
13609728 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 215 (or 195 counting only the distinct ones).
The product of its (nonzero) digits is 18144, while the sum is 36.
The square root of 13609728 is about 3689.1364843280. The cubic root of 13609728 is about 238.7535375882.
The spelling of 13609728 in words is "thirteen million, six hundred nine thousand, seven hundred twenty-eight".
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