28589251 has 4 divisors (see below), whose sum is σ = 28625400. Its totient is φ = 28553104.

The previous prime is 28589237. The next prime is 28589261. The reversal of 28589251 is 15298582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28589251 - 2⁵ = 28589219 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28589201) 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 3 ways as a sum of consecutive naturals, for example, 16861 + ... + 18478.

It is an arithmetic number, because the mean of its divisors is an integer number (7156350).

Almost surely, 2^28589251 is an apocalyptic number.

28589251 is a deficient number, since it is larger than the sum of its proper divisors (36149).

28589251 is an equidigital number, since it uses as much as digits as its factorization.

28589251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36148.

The product of its digits is 57600, while the sum is 40.

The square root of 28589251 is about 5346.8917138839. The cubic root of 28589251 is about 305.7742614385.

The spelling of 28589251 in words is "twenty-eight million, five hundred eighty-nine thousand, two hundred fifty-one".