28224173 has 2 divisors, whose sum is σ = 28224174. Its totient is φ = 28224172.

The previous prime is 28224137. The next prime is 28224191. The reversal of 28224173 is 37142282.

Together with previous prime (28224137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21557449 + 6666724 = 4643^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 28224173 - 2⁶ = 28224109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28224103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112086 + 14112087.

It is an arithmetic number, because the mean of its divisors is an integer number (14112087).

Almost surely, 2^28224173 is an apocalyptic number.

It is an amenable number.

28224173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224173 is an equidigital number, since it uses as much as digits as its factorization.

28224173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 29.

The square root of 28224173 is about 5312.6427510233. The cubic root of 28224173 is about 304.4671265189.

The spelling of 28224173 in words is "twenty-eight million, two hundred twenty-four thousand, one hundred seventy-three".