28168573 has 4 divisors (see below), whose sum is σ = 28181340. Its totient is φ = 28155808.

The previous prime is 28168561. The next prime is 28168601. The reversal of 28168573 is 37586182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2948089 + 25220484 = 1717^2 + 5022^2 .

It is a cyclic number.

It is not a de Polignac number, because 28168573 - 2⁹ = 28168061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28168513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (7045335).

Almost surely, 2^28168573 is an apocalyptic number.

It is an amenable number.

28168573 is a deficient number, since it is larger than the sum of its proper divisors (12767).

28168573 is an equidigital number, since it uses as much as digits as its factorization.

28168573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12766.

The product of its digits is 80640, while the sum is 40.

The square root of 28168573 is about 5307.4073708356. The cubic root of 28168573 is about 304.2670675082.

The spelling of 28168573 in words is "twenty-eight million, one hundred sixty-eight thousand, five hundred seventy-three".