28022173 has 2 divisors, whose sum is σ = 28022174. Its totient is φ = 28022172.

The previous prime is 28022167. The next prime is 28022221. The reversal of 28022173 is 37122082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 1375929 = 5162^2 + 1173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28022173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28022143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14011086 + 14011087.

It is an arithmetic number, because the mean of its divisors is an integer number (14011087).

Almost surely, 2^28022173 is an apocalyptic number.

It is an amenable number.

28022173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28022173 is an equidigital number, since it uses as much as digits as its factorization.

28022173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28022173 is about 5293.5973590745. The cubic root of 28022173 is about 303.7390311427.

Subtracting 28022173 from its reverse (37122082), we obtain a palindrome (9099909).

The spelling of 28022173 in words is "twenty-eight million, twenty-two thousand, one hundred seventy-three".