28667727 has 12 divisors (see below), whose sum is σ = 45173544. Its totient is φ = 17374320.

The previous prime is 28667719. The next prime is 28667801. The reversal of 28667727 is 72776682.

It is a happy number.

It is not a de Polignac number, because 28667727 - 2³ = 28667719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28667707) 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 11 ways as a sum of consecutive naturals, for example, 144688 + ... + 144885.

It is an arithmetic number, because the mean of its divisors is an integer number (3764462).

Almost surely, 2^28667727 is an apocalyptic number.

28667727 is a deficient number, since it is larger than the sum of its proper divisors (16505817).

28667727 is a wasteful number, since it uses less digits than its factorization.

28667727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289590 (or 289587 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 28667727 is about 5354.2251540256. The cubic root of 28667727 is about 306.0537839589.

The spelling of 28667727 in words is "twenty-eight million, six hundred sixty-seven thousand, seven hundred twenty-seven".