28366449 has 16 divisors (see below), whose sum is σ = 40193280. Its totient is φ = 17744400.

The previous prime is 28366441. The next prime is 28366463. The reversal of 28366449 is 94466382.

It is a happy number.

It is not a de Polignac number, because 28366449 - 2³ = 28366441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28366449.

It is not an unprimeable number, because it can be changed into a prime (28366441) 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 in 15 ways as a sum of consecutive naturals, for example, 3774 + ... + 8424.

It is an arithmetic number, because the mean of its divisors is an integer number (2512080).

Almost surely, 2^28366449 is an apocalyptic number.

It is an amenable number.

28366449 is a deficient number, since it is larger than the sum of its proper divisors (11826831).

28366449 is a wasteful number, since it uses less digits than its factorization.

28366449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4780.

The product of its digits is 248832, while the sum is 42.

The square root of 28366449 is about 5326.0162410567. The cubic root of 28366449 is about 304.9778681424.

The spelling of 28366449 in words is "twenty-eight million, three hundred sixty-six thousand, four hundred forty-nine".