28028227 has 2 divisors, whose sum is σ = 28028228. Its totient is φ = 28028226.

The previous prime is 28028213. The next prime is 28028233. The reversal of 28028227 is 72282082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28028227 - 2¹¹ = 28026179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28028327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14014113 + 14014114.

It is an arithmetic number, because the mean of its divisors is an integer number (14014114).

Almost surely, 2^28028227 is an apocalyptic number.

28028227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28028227 is an equidigital number, since it uses as much as digits as its factorization.

28028227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 28028227 is about 5294.1691510567. The cubic root of 28028227 is about 303.7609031520.

The spelling of 28028227 in words is "twenty-eight million, twenty-eight thousand, two hundred twenty-seven".