27989875 has 8 divisors (see below), whose sum is σ = 34931520. Its totient is φ = 22391800.

The previous prime is 27989821. The next prime is 27989881. The reversal of 27989875 is 57898972.

It is not a de Polignac number, because 27989875 - 2⁷ = 27989747 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111835 + ... + 112084.

It is an arithmetic number, because the mean of its divisors is an integer number (4366440).

Almost surely, 2^27989875 is an apocalyptic number.

27989875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27989875 is a deficient number, since it is larger than the sum of its proper divisors (6941645).

27989875 is an equidigital number, since it uses as much as digits as its factorization.

27989875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223934 (or 223924 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 55.

The square root of 27989875 is about 5290.5458130518. The cubic root of 27989875 is about 303.6222910328.

The spelling of 27989875 in words is "twenty-seven million, nine hundred eighty-nine thousand, eight hundred seventy-five".