28230173 has 2 divisors, whose sum is σ = 28230174. Its totient is φ = 28230172.

The previous prime is 28230161. The next prime is 28230179. The reversal of 28230173 is 37103282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19598329 + 8631844 = 4427^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 28230173 - 2¹⁴ = 28213789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28230179) 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, 14115086 + 14115087.

It is an arithmetic number, because the mean of its divisors is an integer number (14115087).

Almost surely, 2^28230173 is an apocalyptic number.

It is an amenable number.

28230173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28230173 is an equidigital number, since it uses as much as digits as its factorization.

28230173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28230173 is about 5313.2074117241. The cubic root of 28230173 is about 304.4886999095.

The spelling of 28230173 in words is "twenty-eight million, two hundred thirty thousand, one hundred seventy-three".