28132875 has 48 divisors (see below), whose sum is σ = 53733888. Its totient is φ = 14112000.

The previous prime is 28132861. The next prime is 28132883. The reversal of 28132875 is 57823182.

It is not a de Polignac number, because 28132875 - 2⁴ = 28132859 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18390 + ... + 19860.

It is an arithmetic number, because the mean of its divisors is an integer number (1119456).

Almost surely, 2^28132875 is an apocalyptic number.

28132875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28132875 is a deficient number, since it is larger than the sum of its proper divisors (25601013).

28132875 is a wasteful number, since it uses less digits than its factorization.

28132875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509 (or 1496 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28132875 is about 5304.0432690543. The cubic root of 28132875 is about 304.1384807393.

The spelling of 28132875 in words is "twenty-eight million, one hundred thirty-two thousand, eight hundred seventy-five".