28348289 has 2 divisors, whose sum is σ = 28348290. Its totient is φ = 28348288.

The previous prime is 28348279. The next prime is 28348321. The reversal of 28348289 is 98284382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 10029889 = 4280^2 + 3167^2 .

It is a cyclic number.

It is not a de Polignac number, because 28348289 - 2²⁴ = 11571073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28348219) 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, 14174144 + 14174145.

It is an arithmetic number, because the mean of its divisors is an integer number (14174145).

Almost surely, 2^28348289 is an apocalyptic number.

It is an amenable number.

28348289 is a deficient number, since it is larger than the sum of its proper divisors (1).

28348289 is an equidigital number, since it uses as much as digits as its factorization.

28348289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 44.

The square root of 28348289 is about 5324.3111291509. The cubic root of 28348289 is about 304.9127726912.

The spelling of 28348289 in words is "twenty-eight million, three hundred forty-eight thousand, two hundred eighty-nine".