28668427 has 2 divisors, whose sum is σ = 28668428. Its totient is φ = 28668426.

The previous prime is 28668421. The next prime is 28668469. The reversal of 28668427 is 72486682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28668427 - 2¹⁹ = 28144139 is a prime.

It is not a weakly prime, because it can be changed into another prime (28668421) 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, 14334213 + 14334214.

It is an arithmetic number, because the mean of its divisors is an integer number (14334214).

Almost surely, 2^28668427 is an apocalyptic number.

28668427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668427 is an equidigital number, since it uses as much as digits as its factorization.

28668427 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 28668427 is about 5354.2905225623. The cubic root of 28668427 is about 306.0562749820.

The spelling of 28668427 in words is "twenty-eight million, six hundred sixty-eight thousand, four hundred twenty-seven".