28679249 has 2 divisors, whose sum is σ = 28679250. Its totient is φ = 28679248.

The previous prime is 28679219. The next prime is 28679281. The reversal of 28679249 is 94297682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 110224 = 5345^2 + 332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28679249 is a prime.

It is not a weakly prime, because it can be changed into another prime (28679219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14339624 + 14339625.

It is an arithmetic number, because the mean of its divisors is an integer number (14339625).

Almost surely, 2^28679249 is an apocalyptic number.

It is an amenable number.

28679249 is a deficient number, since it is larger than the sum of its proper divisors (1).

28679249 is an equidigital number, since it uses as much as digits as its factorization.

28679249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 28679249 is about 5355.3010186170. The cubic root of 28679249 is about 306.0947810399.

The spelling of 28679249 in words is "twenty-eight million, six hundred seventy-nine thousand, two hundred forty-nine".