Search a number
-
+
28888 = 2323157
BaseRepresentation
bin111000011011000
31110121221
413003120
51411023
6341424
7150136
oct70330
943557
1028888
111a782
1214874
13101c2
14a756
15885d
hex70d8

28888 has 16 divisors (see below), whose sum is σ = 56880. Its totient is φ = 13728.

The previous prime is 28879. The next prime is 28901. The reversal of 28888 is 88882.

It can be divided in two parts, 2888 and 8, that multiplied together give a square (23104 = 1522).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

28888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106 + ... + 262.

It is an arithmetic number, because the mean of its divisors is an integer number (3555).

228888 is an apocalyptic number.

It is an amenable number.

28888 is a deficient number, since it is larger than the sum of its proper divisors (27992).

28888 is a wasteful number, since it uses less digits than its factorization.

28888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 182 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 28888 is about 169.9647022178. The cubic root of 28888 is about 30.6835655654.

The spelling of 28888 in words is "twenty-eight thousand, eight hundred eighty-eight".

Divisors: 1 2 4 8 23 46 92 157 184 314 628 1256 3611 7222 14444 28888