28866427 has 2 divisors, whose sum is σ = 28866428. Its totient is φ = 28866426.

The previous prime is 28866389. The next prime is 28866433. The reversal of 28866427 is 72466882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28866427 is a prime.

It is not a weakly prime, because it can be changed into another prime (28866727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14433213 + 14433214.

It is an arithmetic number, because the mean of its divisors is an integer number (14433214).

Almost surely, 2^28866427 is an apocalyptic number.

28866427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28866427 is an equidigital number, since it uses as much as digits as its factorization.

28866427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 28866427 is about 5372.7485517191. The cubic root of 28866427 is about 306.7592569872.

The spelling of 28866427 in words is "twenty-eight million, eight hundred sixty-six thousand, four hundred twenty-seven".