28366227 has 16 divisors (see below), whose sum is σ = 42245280. Its totient is φ = 18811296.

The previous prime is 28366213. The next prime is 28366237. The reversal of 28366227 is 72266382.

28366227 is a `hidden beast` number, since 28 + 3 + 6 + 622 + 7 = 666.

It is not a de Polignac number, because 28366227 - 2⁴ = 28366211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28366191 and 28366200.

It is not an unprimeable number, because it can be changed into a prime (28366237) 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, 2653 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (2640330).

Almost surely, 2^28366227 is an apocalyptic number.

28366227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28366227 is a deficient number, since it is larger than the sum of its proper divisors (13879053).

28366227 is a wasteful number, since it uses less digits than its factorization.

28366227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539 (or 5533 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 28366227 is about 5325.9953999229. The cubic root of 28366227 is about 304.9770725397.

The spelling of 28366227 in words is "twenty-eight million, three hundred sixty-six thousand, two hundred twenty-seven".