28366945 has 8 divisors (see below), whose sum is σ = 34081344. Its totient is φ = 22666224.

The previous prime is 28366937. The next prime is 28366963. The reversal of 28366945 is 54966382.

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

It is a cyclic number.

It is not a de Polignac number, because 28366945 - 2³ = 28366937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1902 + ... + 7768.

It is an arithmetic number, because the mean of its divisors is an integer number (4260168).

Almost surely, 2^28366945 is an apocalyptic number.

It is an amenable number.

28366945 is a deficient number, since it is larger than the sum of its proper divisors (5714399).

28366945 is an equidigital number, since it uses as much as digits as its factorization.

28366945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839.

The product of its digits is 311040, while the sum is 43.

The square root of 28366945 is about 5326.0628047367. The cubic root of 28366945 is about 304.9796456900.

The spelling of 28366945 in words is "twenty-eight million, three hundred sixty-six thousand, nine hundred forty-five".