28224011 has 2 divisors, whose sum is σ = 28224012. Its totient is φ = 28224010.

The previous prime is 28223941. The next prime is 28224019. The reversal of 28224011 is 11042282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28224011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28224019) 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, 14112005 + 14112006.

It is an arithmetic number, because the mean of its divisors is an integer number (14112006).

Almost surely, 2^28224011 is an apocalyptic number.

28224011 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224011 is an equidigital number, since it uses as much as digits as its factorization.

28224011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 28224011 is about 5312.6275043522. The cubic root of 28224011 is about 304.4665439950.

Adding to 28224011 its reverse (11042282), we get a palindrome (39266293).

The spelling of 28224011 in words is "twenty-eight million, two hundred twenty-four thousand, eleven".