28518227 has 2 divisors, whose sum is σ = 28518228. Its totient is φ = 28518226.

The previous prime is 28518211. The next prime is 28518239. The reversal of 28518227 is 72281582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28518227 - 2⁴ = 28518211 is a prime.

It is a Chen prime.

It is equal to p_1771685 and since 28518227 and 1771685 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28518257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14259113 + 14259114.

It is an arithmetic number, because the mean of its divisors is an integer number (14259114).

Almost surely, 2^28518227 is an apocalyptic number.

28518227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28518227 is an equidigital number, since it uses as much as digits as its factorization.

28518227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 28518227 is about 5340.2459681179. The cubic root of 28518227 is about 305.5208407846.

The spelling of 28518227 in words is "twenty-eight million, five hundred eighteen thousand, two hundred twenty-seven".