28164173 has 4 divisors (see below), whose sum is σ = 28192320. Its totient is φ = 28136028.

The previous prime is 28164119. The next prime is 28164197. The reversal of 28164173 is 37146182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28164173 - 2¹⁸ = 27902029 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 (28164113) 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, 12515 + ... + 14592.

It is an arithmetic number, because the mean of its divisors is an integer number (7048080).

Almost surely, 2^28164173 is an apocalyptic number.

It is an amenable number.

28164173 is a deficient number, since it is larger than the sum of its proper divisors (28147).

28164173 is a wasteful number, since it uses less digits than its factorization.

28164173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28146.

The product of its digits is 8064, while the sum is 32.

The square root of 28164173 is about 5306.9928396409. The cubic root of 28164173 is about 304.2512242632.

Subtracting 28164173 from its reverse (37146182), we obtain a square (8982009 = 2997²).

The spelling of 28164173 in words is "twenty-eight million, one hundred sixty-four thousand, one hundred seventy-three".