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28866 = 2317283
BaseRepresentation
bin111000011000010
31110121010
413003002
51410431
6341350
7150105
oct70302
943533
1028866
111a762
1214856
13101a6
14a73c
158846
hex70c2

28866 has 16 divisors (see below), whose sum is σ = 61344. Its totient is φ = 9024.

The previous prime is 28859. The next prime is 28867. The reversal of 28866 is 66882.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28866.

It is not an unprimeable number, because it can be changed into a prime (28867) by changing a digit.

28866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 243.

It is an arithmetic number, because the mean of its divisors is an integer number (3834).

228866 is an apocalyptic number.

28866 is an abundant number, since it is smaller than the sum of its proper divisors (32478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30672).

28866 is a wasteful number, since it uses less digits than its factorization.

28866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 4608, while the sum is 30.

The square root of 28866 is about 169.8999705709. The cubic root of 28866 is about 30.6757744424.

The spelling of 28866 in words is "twenty-eight thousand, eight hundred sixty-six".

Divisors: 1 2 3 6 17 34 51 102 283 566 849 1698 4811 9622 14433 28866