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28122 = 2343109
BaseRepresentation
bin110110111011010
31102120120
412313122
51344442
6334110
7144663
oct66732
942516
1028122
111a146
1214336
13ca53
14a36a
1584ec
hex6dda

28122 has 16 divisors (see below), whose sum is σ = 58080. Its totient is φ = 9072.

The previous prime is 28111. The next prime is 28123. The reversal of 28122 is 22182.

It can be divided in two parts, 281 and 22, that added together give a palindrome (303).

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28122.

It is not an unprimeable number, because it can be changed into a prime (28123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204 + ... + 312.

It is an arithmetic number, because the mean of its divisors is an integer number (3630).

228122 is an apocalyptic number.

28122 is an abundant number, since it is smaller than the sum of its proper divisors (29958).

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 (29040).

28122 is a wasteful number, since it uses less digits than its factorization.

28122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its digits is 64, while the sum is 15.

The square root of 28122 is about 167.6961538020. The cubic root of 28122 is about 30.4099286591.

The spelling of 28122 in words is "twenty-eight thousand, one hundred twenty-two".

Divisors: 1 2 3 6 43 86 109 129 218 258 327 654 4687 9374 14061 28122