28965889 has 8 divisors (see below), whose sum is σ = 29463840. Its totient is φ = 28470816.

The previous prime is 28965887. The next prime is 28965913. The reversal of 28965889 is 98856982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28965889 - 2¹ = 28965887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28965887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30114 + ... + 31060.

It is an arithmetic number, because the mean of its divisors is an integer number (3682980).

Almost surely, 2^28965889 is an apocalyptic number.

It is an amenable number.

28965889 is a deficient number, since it is larger than the sum of its proper divisors (497951).

28965889 is an equidigital number, since it uses as much as digits as its factorization.

28965889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its digits is 2488320, while the sum is 55.

The square root of 28965889 is about 5381.9967484197. The cubic root of 28965889 is about 307.1111757685. Note that the first 4 decimals are identical.

The spelling of 28965889 in words is "twenty-eight million, nine hundred sixty-five thousand, eight hundred eighty-nine".