28349 has 2 divisors, whose sum is σ = 28350. Its totient is φ = 28348.

The previous prime is 28319. The next prime is 28351. The reversal of 28349 is 94382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 11449 = 130^2 + 107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28349 is a prime.

Together with 28351, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28309) 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, 14174 + 14175.

It is an arithmetic number, because the mean of its divisors is an integer number (14175).

2²⁸³⁴⁹ is an apocalyptic number.

It is an amenable number.

28349 is a deficient number, since it is larger than the sum of its proper divisors (1).

28349 is an equidigital number, since it uses as much as digits as its factorization.

28349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 28349 is about 168.3716128093. The cubic root of 28349 is about 30.4915321830.

The spelling of 28349 in words is "twenty-eight thousand, three hundred forty-nine".