28589999 has 4 divisors (see below), whose sum is σ = 28602864. Its totient is φ = 28577136.

The previous prime is 28589993. The next prime is 28590007. The reversal of 28589999 is 99998582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99998582 = 2 ⋅49999291.

It is a cyclic number.

It is not a de Polignac number, because 28589999 - 2⁴ = 28589983 is a prime.

It is a Duffinian number.

28589999 is a modest number, since divided by 9999 gives 2858 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28589993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147 + ... + 7860.

It is an arithmetic number, because the mean of its divisors is an integer number (7150716).

Almost surely, 2^28589999 is an apocalyptic number.

28589999 is a deficient number, since it is larger than the sum of its proper divisors (12865).

28589999 is a wasteful number, since it uses less digits than its factorization.

28589999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12864.

The product of its digits is 4199040, while the sum is 59.

The square root of 28589999 is about 5346.9616606069. The cubic root of 28589999 is about 305.7769281418.

The spelling of 28589999 in words is "twenty-eight million, five hundred eighty-nine thousand, nine hundred ninety-nine".