28118227 has 2 divisors, whose sum is σ = 28118228. Its totient is φ = 28118226.

The previous prime is 28118219. The next prime is 28118239. The reversal of 28118227 is 72281182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28118227 - 2³ = 28118219 is a prime.

It is not a weakly prime, because it can be changed into another prime (28118257) 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, 14059113 + 14059114.

It is an arithmetic number, because the mean of its divisors is an integer number (14059114).

Almost surely, 2^28118227 is an apocalyptic number.

28118227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28118227 is an equidigital number, since it uses as much as digits as its factorization.

28118227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3584, while the sum is 31.

The square root of 28118227 is about 5302.6622558862. The cubic root of 28118227 is about 304.0856861127.

The spelling of 28118227 in words is "twenty-eight million, one hundred eighteen thousand, two hundred twenty-seven".