28091927 has 2 divisors, whose sum is σ = 28091928. Its totient is φ = 28091926.

The previous prime is 28091897. The next prime is 28091941. The reversal of 28091927 is 72919082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28091927 - 2⁶ = 28091863 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 (28091977) 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 as a sum of consecutive naturals, namely, 14045963 + 14045964.

It is an arithmetic number, because the mean of its divisors is an integer number (14045964).

Almost surely, 2^28091927 is an apocalyptic number.

28091927 is a deficient number, since it is larger than the sum of its proper divisors (1).

28091927 is an equidigital number, since it uses as much as digits as its factorization.

28091927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 28091927 is about 5300.1817893352. The cubic root of 28091927 is about 303.9908490724.

The spelling of 28091927 in words is "twenty-eight million, ninety-one thousand, nine hundred twenty-seven".