28044589 has 4 divisors (see below), whose sum is σ = 29520640. Its totient is φ = 26568540.

The previous prime is 28044587. The next prime is 28044607. The reversal of 28044589 is 98544082.

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 28044589 - 2¹ = 28044587 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 (28044587) 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, 737997 + ... + 738034.

It is an arithmetic number, because the mean of its divisors is an integer number (7380160).

Almost surely, 2^28044589 is an apocalyptic number.

It is an amenable number.

28044589 is a deficient number, since it is larger than the sum of its proper divisors (1476051).

28044589 is a wasteful number, since it uses less digits than its factorization.

28044589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476050.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28044589 is about 5295.7142105669. The cubic root of 28044589 is about 303.8200003504.

The spelling of 28044589 in words is "twenty-eight million, forty-four thousand, five hundred eighty-nine".