28247589 has 8 divisors (see below), whose sum is σ = 41848320. Its totient is φ = 18831708.

The previous prime is 28247587. The next prime is 28247599. The reversal of 28247589 is 98574282.

28247589 is a `hidden beast` number, since 28 + 2 + 47 + 589 = 666.

It is not a de Polignac number, because 28247589 - 2¹ = 28247587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28247587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523077 + ... + 523130.

It is an arithmetic number, because the mean of its divisors is an integer number (5231040).

Almost surely, 2^28247589 is an apocalyptic number.

It is an amenable number.

28247589 is a deficient number, since it is larger than the sum of its proper divisors (13600731).

28247589 is a wasteful number, since it uses less digits than its factorization.

28247589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046216 (or 1046210 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28247589 is about 5314.8460937265. The cubic root of 28247589 is about 304.5513029625.

The spelling of 28247589 in words is "twenty-eight million, two hundred forty-seven thousand, five hundred eighty-nine".