28885223 has 2 divisors, whose sum is σ = 28885224. Its totient is φ = 28885222.

The previous prime is 28885183. The next prime is 28885249. The reversal of 28885223 is 32258882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28885223 - 2²⁴ = 12108007 is a prime.

It is a super-2 number, since 2×28885223² = 1668712215519458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28885253) 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, 14442611 + 14442612.

It is an arithmetic number, because the mean of its divisors is an integer number (14442612).

Almost surely, 2^28885223 is an apocalyptic number.

28885223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28885223 is an equidigital number, since it uses as much as digits as its factorization.

28885223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 38.

The square root of 28885223 is about 5374.4974648799. The cubic root of 28885223 is about 306.8258233135.

The spelling of 28885223 in words is "twenty-eight million, eight hundred eighty-five thousand, two hundred twenty-three".