Search a number
-
+
228085 = 51121329
BaseRepresentation
bin110111101011110101
3102120212121
4313223311
524244320
64515541
71636654
oct675365
9376777
10228085
11146400
12abbb1
137ca80
145d19b
15478aa
hex37af5

228085 has 24 divisors (see below), whose sum is σ = 335160. Its totient is φ = 147840.

The previous prime is 228077. The next prime is 228097. The reversal of 228085 is 580822.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 223729 = 66^2 + 473^2 .

It is not a de Polignac number, because 228085 - 23 = 228077 is a prime.

It is a plaindrome in base 15.

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 23 ways as a sum of consecutive naturals, for example, 7851 + ... + 7879.

It is an arithmetic number, because the mean of its divisors is an integer number (13965).

2228085 is an apocalyptic number.

It is an amenable number.

228085 is a deficient number, since it is larger than the sum of its proper divisors (107075).

228085 is a wasteful number, since it uses less digits than its factorization.

228085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 228085 is about 477.5824536140. The cubic root of 228085 is about 61.0987382358.

The spelling of 228085 in words is "two hundred twenty-eight thousand, eighty-five".

Divisors: 1 5 11 13 29 55 65 121 143 145 319 377 605 715 1573 1595 1885 3509 4147 7865 17545 20735 45617 228085