28517132 has 24 divisors (see below), whose sum is σ = 57545376. Its totient is φ = 12112128.

The previous prime is 28517077. The next prime is 28517161. The reversal of 28517132 is 23171582.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28517095 and 28517104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (2397724).

Almost surely, 2^28517132 is an apocalyptic number.

It is an amenable number.

28517132 is an abundant number, since it is smaller than the sum of its proper divisors (29028244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28517132 is a wasteful number, since it uses less digits than its factorization.

28517132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137 (or 9135 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 28517132 is about 5340.1434437663. The cubic root of 28517132 is about 305.5169304246.

The spelling of 28517132 in words is "twenty-eight million, five hundred seventeen thousand, one hundred thirty-two".