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28587 = 313733
BaseRepresentation
bin110111110101011
31110012210
412332223
51403322
6340203
7146226
oct67653
943183
1028587
111a529
1214663
1310020
14a5bd
15870c
hex6fab

28587 has 8 divisors (see below), whose sum is σ = 41104. Its totient is φ = 17568.

The previous prime is 28579. The next prime is 28591. The reversal of 28587 is 78582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28587 - 23 = 28579 is a prime.

It is a Duffinian number.

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 28587.

It is not an unprimeable number, because it can be changed into a prime (28517) 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 in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 405.

It is an arithmetic number, because the mean of its divisors is an integer number (5138).

228587 is an apocalyptic number.

28587 is a deficient number, since it is larger than the sum of its proper divisors (12517).

28587 is a wasteful number, since it uses less digits than its factorization.

28587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749.

The product of its digits is 4480, while the sum is 30.

The square root of 28587 is about 169.0769055785. The cubic root of 28587 is about 30.5766236092.

The spelling of 28587 in words is "twenty-eight thousand, five hundred eighty-seven".

Divisors: 1 3 13 39 733 2199 9529 28587