26728173 has 6 divisors (see below), whose sum is σ = 38607374. Its totient is φ = 17818776.

The previous prime is 26728157. The next prime is 26728181. The reversal of 26728173 is 37182762.

It can be written as a sum of positive squares in only one way, i.e., 13638249 + 13089924 = 3693^2 + 3618^2 .

It is not a de Polignac number, because 26728173 - 2⁴ = 26728157 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 (26728103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1484890 + ... + 1484907.

Almost surely, 2^26728173 is an apocalyptic number.

It is an amenable number.

26728173 is a deficient number, since it is larger than the sum of its proper divisors (11879201).

26728173 is a wasteful number, since it uses less digits than its factorization.

26728173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969803 (or 2969800 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 26728173 is about 5169.9296900441. The cubic root of 26728173 is about 298.9898357115.

The spelling of 26728173 in words is "twenty-six million, seven hundred twenty-eight thousand, one hundred seventy-three".