28536589 has 4 divisors (see below), whose sum is σ = 29020320. Its totient is φ = 28052860.

The previous prime is 28536587. The next prime is 28536601. The reversal of 28536589 is 98563582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28536589 - 2¹ = 28536587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28536587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241777 + ... + 241894.

It is an arithmetic number, because the mean of its divisors is an integer number (7255080).

Almost surely, 2^28536589 is an apocalyptic number.

It is an amenable number.

28536589 is a deficient number, since it is larger than the sum of its proper divisors (483731).

28536589 is an equidigital number, since it uses as much as digits as its factorization.

28536589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483730.

The product of its digits is 518400, while the sum is 46.

The square root of 28536589 is about 5341.9649006709. The cubic root of 28536589 is about 305.5863985076.

The spelling of 28536589 in words is "twenty-eight million, five hundred thirty-six thousand, five hundred eighty-nine".