28115875 has 32 divisors (see below), whose sum is σ = 37806912. Its totient is φ = 20800000.

The previous prime is 28115837. The next prime is 28115891. The reversal of 28115875 is 57851182.

It is not a de Polignac number, because 28115875 - 2⁹ = 28115363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214560 + ... + 214690.

It is an arithmetic number, because the mean of its divisors is an integer number (1181466).

Almost surely, 2^28115875 is an apocalyptic number.

28115875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28115875 is a deficient number, since it is larger than the sum of its proper divisors (9691037).

28115875 is a wasteful number, since it uses less digits than its factorization.

28115875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 254 counting only the distinct ones).

The product of its digits is 22400, while the sum is 37.

The square root of 28115875 is about 5302.4404758564. The cubic root of 28115875 is about 304.0772072770.

The spelling of 28115875 in words is "twenty-eight million, one hundred fifteen thousand, eight hundred seventy-five".