28666927 has 2 divisors, whose sum is σ = 28666928. Its totient is φ = 28666926.

The previous prime is 28666921. The next prime is 28666949. The reversal of 28666927 is 72966682.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28666927 - 2³ = 28666919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28666921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333463 + 14333464.

It is an arithmetic number, because the mean of its divisors is an integer number (14333464).

Almost surely, 2^28666927 is an apocalyptic number.

28666927 is a deficient number, since it is larger than the sum of its proper divisors (1).

28666927 is an equidigital number, since it uses as much as digits as its factorization.

28666927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 28666927 is about 5354.1504461492. The cubic root of 28666927 is about 306.0509370258.

The spelling of 28666927 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred twenty-seven".