Base | Representation |
---|---|
bin | 1000101101001100101 |
3 | 112111100010 |
4 | 1011221211 |
5 | 33112120 |
6 | 10040433 |
7 | 2265510 |
oct | 1055145 |
9 | 474303 |
10 | 285285 |
11 | 185380 |
12 | 119119 |
13 | 9cb10 |
14 | 75d77 |
15 | 597e0 |
hex | 45a65 |
285285 has 64 divisors (see below), whose sum is σ = 645120. Its totient is φ = 103680.
The previous prime is 285283. The next prime is 285287. The reversal of 285285 is 582582.
It is an interprime number because it is at equal distance from previous prime (285283) and next prime (285287).
It is not a de Polignac number, because 285285 - 21 = 285283 is a prime.
285285 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (285281) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15006 + ... + 15024.
It is an arithmetic number, because the mean of its divisors is an integer number (10080).
2285285 is an apocalyptic number.
It is an amenable number.
285285 is an abundant number, since it is smaller than the sum of its proper divisors (359835).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
285285 is a wasteful number, since it uses less digits than its factorization.
285285 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 58.
The product of its digits is 6400, while the sum is 30.
The square root of 285285 is about 534.1207728595. The cubic root of 285285 is about 65.8303724923.
The spelling of 285285 in words is "two hundred eighty-five thousand, two hundred eighty-five".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •