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28932 = 2232411
BaseRepresentation
bin111000100000100
31110200120
413010010
51411212
6341540
7150231
oct70404
943616
1028932
111a812
12148b0
1310227
14a788
15888c
hex7104

28932 has 12 divisors (see below), whose sum is σ = 67536. Its totient is φ = 9640.

The previous prime is 28927. The next prime is 28933. The reversal of 28932 is 23982.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 27 + 83 + 94 + 39 + 211 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (28933) by changing a digit.

28932 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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194 + ... + 1217.

It is an arithmetic number, because the mean of its divisors is an integer number (5628).

228932 is an apocalyptic number.

It is an amenable number.

28932 is an abundant number, since it is smaller than the sum of its proper divisors (38604).

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 (33768).

28932 is a wasteful number, since it uses less digits than its factorization.

28932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418 (or 2416 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 28932 is about 170.0940916081. The cubic root of 28932 is about 30.6991359524.

Subtracting from 28932 its reverse (23982), we obtain a triangular number (4950 = T99).

The spelling of 28932 in words is "twenty-eight thousand, nine hundred thirty-two".

Divisors: 1 2 3 4 6 12 2411 4822 7233 9644 14466 28932