28347 has 8 divisors (see below), whose sum is σ = 41280. Its totient is φ = 17160.

The previous prime is 28319. The next prime is 28349. The reversal of 28347 is 74382.

28347 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 28347 - 2⁶ = 28283 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (28349) 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, 397 + ... + 462.

It is an arithmetic number, because the mean of its divisors is an integer number (5160).

2²⁸³⁴⁷ is an apocalyptic number.

28347 is a deficient number, since it is larger than the sum of its proper divisors (12933).

28347 is a wasteful number, since it uses less digits than its factorization.

28347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its digits is 1344, while the sum is 24.

The square root of 28347 is about 168.3656734611. The cubic root of 28347 is about 30.4908151148.

The spelling of 28347 in words is "twenty-eight thousand, three hundred forty-seven".