28126173 has 4 divisors (see below), whose sum is σ = 37501568. Its totient is φ = 18750780.

The previous prime is 28126159. The next prime is 28126181. The reversal of 28126173 is 37162182.

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 not a de Polignac number, because 28126173 - 2⁴ = 28126157 is a prime.

It is a Duffinian number.

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 28126173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28126103) 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, 4687693 + ... + 4687698.

It is an arithmetic number, because the mean of its divisors is an integer number (9375392).

Almost surely, 2^28126173 is an apocalyptic number.

It is an amenable number.

28126173 is a deficient number, since it is larger than the sum of its proper divisors (9375395).

28126173 is an equidigital number, since it uses as much as digits as its factorization.

28126173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9375394.

The product of its digits is 4032, while the sum is 30.

The square root of 28126173 is about 5303.4114492466. The cubic root of 28126173 is about 304.1143275261.

The spelling of 28126173 in words is "twenty-eight million, one hundred twenty-six thousand, one hundred seventy-three".