28548589 has 4 divisors (see below), whose sum is σ = 29789856. Its totient is φ = 27307324.

The previous prime is 28548581. The next prime is 28548601. The reversal of 28548589 is 98584582.

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 28548589 - 2³ = 28548581 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 (28548581) 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, 620599 + ... + 620644.

It is an arithmetic number, because the mean of its divisors is an integer number (7447464).

Almost surely, 2^28548589 is an apocalyptic number.

It is an amenable number.

28548589 is a deficient number, since it is larger than the sum of its proper divisors (1241267).

28548589 is a wasteful number, since it uses less digits than its factorization.

28548589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241266.

The product of its digits is 921600, while the sum is 49.

The square root of 28548589 is about 5343.0879648383. The cubic root of 28548589 is about 305.6292268323.

The spelling of 28548589 in words is "twenty-eight million, five hundred forty-eight thousand, five hundred eighty-nine".