28886689 has 16 divisors (see below), whose sum is σ = 34376832. Its totient is φ = 24000768.

The previous prime is 28886687. The next prime is 28886719. The reversal of 28886689 is 98668882.

It is a cyclic number.

It is not a de Polignac number, because 28886689 - 2¹ = 28886687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28886681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2242 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (2148552).

Almost surely, 2^28886689 is an apocalyptic number.

It is an amenable number.

28886689 is a deficient number, since it is larger than the sum of its proper divisors (5490143).

28886689 is a wasteful number, since it uses less digits than its factorization.

28886689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736.

The product of its digits is 2654208, while the sum is 55.

The square root of 28886689 is about 5374.6338479937. The cubic root of 28886689 is about 306.8310139612.

The spelling of 28886689 in words is "twenty-eight million, eight hundred eighty-six thousand, six hundred eighty-nine".