28432173 has 16 divisors (see below), whose sum is σ = 47264256. Its totient is φ = 14769840.

The previous prime is 28432171. The next prime is 28432199. The reversal of 28432173 is 37123482.

It is not a de Polignac number, because 28432173 - 2¹ = 28432171 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28432173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61311 + ... + 61772.

It is an arithmetic number, because the mean of its divisors is an integer number (2954016).

Almost surely, 2^28432173 is an apocalyptic number.

It is an amenable number.

28432173 is a deficient number, since it is larger than the sum of its proper divisors (18832083).

28432173 is a wasteful number, since it uses less digits than its factorization.

28432173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123104.

The product of its digits is 8064, while the sum is 30.

The square root of 28432173 is about 5332.1827613089. The cubic root of 28432173 is about 305.2132272294.

The spelling of 28432173 in words is "twenty-eight million, four hundred thirty-two thousand, one hundred seventy-three".