28667275 has 24 divisors (see below), whose sum is σ = 43754144. Its totient is φ = 18144000.

The previous prime is 28667231. The next prime is 28667279. The reversal of 28667275 is 57276682.

It is not a de Polignac number, because 28667275 - 2⁷ = 28667147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28667279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4026 + ... + 8575.

Almost surely, 2^28667275 is an apocalyptic number.

28667275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28667275 is a deficient number, since it is larger than the sum of its proper divisors (15086869).

28667275 is a wasteful number, since it uses less digits than its factorization.

28667275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12626 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 28667275 is about 5354.1829442035. The cubic root of 28667275 is about 306.0521754482.

The spelling of 28667275 in words is "twenty-eight million, six hundred sixty-seven thousand, two hundred seventy-five".