28655227 has 2 divisors, whose sum is σ = 28655228. Its totient is φ = 28655226.

The previous prime is 28655203. The next prime is 28655239. The reversal of 28655227 is 72255682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28655227 is a prime.

It is a super-2 number, since 2×28655227² = 1642244068843058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28655257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327613 + 14327614.

It is an arithmetic number, because the mean of its divisors is an integer number (14327614).

Almost surely, 2^28655227 is an apocalyptic number.

28655227 is a deficient number, since it is larger than the sum of its proper divisors (1).

28655227 is an equidigital number, since it uses as much as digits as its factorization.

28655227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 28655227 is about 5353.0577243292. The cubic root of 28655227 is about 306.0092945758.

It can be divided in two parts, 28655 and 227, that added together give a palindrome (28882).

The spelling of 28655227 in words is "twenty-eight million, six hundred fifty-five thousand, two hundred twenty-seven".