28092173 has 4 divisors (see below), whose sum is σ = 28622268. Its totient is φ = 27562080.

The previous prime is 28092161. The next prime is 28092187. The reversal of 28092173 is 37129082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12866569 + 15225604 = 3587^2 + 3902^2 .

It is a cyclic number.

It is not a de Polignac number, because 28092173 - 2¹⁰ = 28091149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28092133) 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 3 ways as a sum of consecutive naturals, for example, 264968 + ... + 265073.

It is an arithmetic number, because the mean of its divisors is an integer number (7155567).

Almost surely, 2^28092173 is an apocalyptic number.

It is an amenable number.

28092173 is a deficient number, since it is larger than the sum of its proper divisors (530095).

28092173 is an equidigital number, since it uses as much as digits as its factorization.

28092173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530094.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 28092173 is about 5300.2049960355. The cubic root of 28092173 is about 303.9917364155.

The spelling of 28092173 in words is "twenty-eight million, ninety-two thousand, one hundred seventy-three".