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28718 = 283173
BaseRepresentation
bin111000000101110
31110101122
413000232
51404333
6340542
7146504
oct70056
943348
1028718
111a638
1214752
13100c1
14a674
158798
hex702e

28718 has 8 divisors (see below), whose sum is σ = 43848. Its totient is φ = 14104.

The previous prime is 28711. The next prime is 28723. The reversal of 28718 is 81782.

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

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 28718.

It is not an unprimeable number, because it can be changed into a prime (28711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (5481).

228718 is an apocalyptic number.

28718 is a deficient number, since it is larger than the sum of its proper divisors (15130).

28718 is a wasteful number, since it uses less digits than its factorization.

28718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258.

The product of its digits is 896, while the sum is 26.

The square root of 28718 is about 169.4638604541. The cubic root of 28718 is about 30.6232582655.

The spelling of 28718 in words is "twenty-eight thousand, seven hundred eighteen".

Divisors: 1 2 83 166 173 346 14359 28718