28222689 has 16 divisors (see below), whose sum is σ = 41140224. Its totient is φ = 17067600.

The previous prime is 28222681. The next prime is 28222697. The reversal of 28222689 is 98622282.

It is an interprime number because it is at equal distance from previous prime (28222681) and next prime (28222697).

It is not a de Polignac number, because 28222689 - 2³ = 28222681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28222681) 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 in 15 ways as a sum of consecutive naturals, for example, 27984 + ... + 28974.

It is an arithmetic number, because the mean of its divisors is an integer number (2571264).

Almost surely, 2^28222689 is an apocalyptic number.

It is an amenable number.

28222689 is a deficient number, since it is larger than the sum of its proper divisors (12917535).

28222689 is a wasteful number, since it uses less digits than its factorization.

28222689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868.

The product of its digits is 55296, while the sum is 39.

The square root of 28222689 is about 5312.5030823520. The cubic root of 28222689 is about 304.4617902287.

The spelling of 28222689 in words is "twenty-eight million, two hundred twenty-two thousand, six hundred eighty-nine".