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BaseRepresentation
bin110110110110111
31102112021
412312313
51344322
6334011
7144613
oct66667
942467
1028087
111a114
1214307
13ca27
14a343
1584c7
hex6db7

28087 has 2 divisors, whose sum is σ = 28088. Its totient is φ = 28086.

The previous prime is 28081. The next prime is 28097. The reversal of 28087 is 78082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28087 is a prime.

28087 is a lucky number.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14043 + 14044.

It is an arithmetic number, because the mean of its divisors is an integer number (14044).

228087 is an apocalyptic number.

28087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28087 is an equidigital number, since it uses as much as digits as its factorization.

28087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 28087 is about 167.5917659075. The cubic root of 28087 is about 30.3973075870.

The spelling of 28087 in words is "twenty-eight thousand, eighty-seven".