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28124 = 227989
BaseRepresentation
bin110110111011100
31102120122
412313130
51344444
6334112
7144665
oct66734
942518
1028124
111a148
1214338
13ca55
14a36c
1584ee
hex6ddc

28124 has 12 divisors (see below), whose sum is σ = 50400. Its totient is φ = 13728.

The previous prime is 28123. The next prime is 28151. The reversal of 28124 is 42182.

It is a plaindrome in base 5.

It is a nialpdrome in base 13.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 272 + ... + 360.

It is an arithmetic number, because the mean of its divisors is an integer number (4200).

228124 is an apocalyptic number.

It is an amenable number.

28124 is a deficient number, since it is larger than the sum of its proper divisors (22276).

28124 is a wasteful number, since it uses less digits than its factorization.

28124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 28124 is about 167.7021168620. The cubic root of 28124 is about 30.4106495468.

The spelling of 28124 in words is "twenty-eight thousand, one hundred twenty-four".

Divisors: 1 2 4 79 89 158 178 316 356 7031 14062 28124