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28847 = 713317
BaseRepresentation
bin111000010101111
31110120102
413002233
51410342
6341315
7150050
oct70257
943512
1028847
111a745
121483b
1310190
14a727
158832
hex70af

28847 has 8 divisors (see below), whose sum is σ = 35616. Its totient is φ = 22752.

The previous prime is 28843. The next prime is 28859. The reversal of 28847 is 74882.

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

It is a cyclic number.

It is not a de Polignac number, because 28847 - 22 = 28843 is a prime.

It is a nialpdrome in base 15.

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 28847.

It is not an unprimeable number, because it can be changed into a prime (28843) 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, 68 + ... + 249.

It is an arithmetic number, because the mean of its divisors is an integer number (4452).

228847 is an apocalyptic number.

28847 is a deficient number, since it is larger than the sum of its proper divisors (6769).

28847 is a wasteful number, since it uses less digits than its factorization.

28847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

The product of its digits is 3584, while the sum is 29.

The square root of 28847 is about 169.8440461129. The cubic root of 28847 is about 30.6690425590.

It can be divided in two parts, 28 and 847, that multiplied together give a square (23716 = 1542).

The spelling of 28847 in words is "twenty-eight thousand, eight hundred forty-seven".

Divisors: 1 7 13 91 317 2219 4121 28847