28588889 has 16 divisors (see below), whose sum is σ = 33530112. Its totient is φ = 23869248.

The previous prime is 28588877. The next prime is 28588909. The reversal of 28588889 is 98888582.

It is a cyclic number.

It is not a de Polignac number, because 28588889 - 2⁴ = 28588873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28588829) 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, 97427 + ... + 97719.

It is an arithmetic number, because the mean of its divisors is an integer number (2095632).

Almost surely, 2^28588889 is an apocalyptic number.

It is an amenable number.

28588889 is a deficient number, since it is larger than the sum of its proper divisors (4941223).

28588889 is a wasteful number, since it uses less digits than its factorization.

28588889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616.

The product of its digits is 2949120, while the sum is 56.

The square root of 28588889 is about 5346.8578623337. The cubic root of 28588889 is about 305.7729708514.

The spelling of 28588889 in words is "twenty-eight million, five hundred eighty-eight thousand, eight hundred eighty-nine".