28233589 has 2 divisors, whose sum is σ = 28233590. Its totient is φ = 28233588.

The previous prime is 28233587. The next prime is 28233607. The reversal of 28233589 is 98533282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21316689 + 6916900 = 4617^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 28233589 - 2¹ = 28233587 is a prime.

Together with 28233587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28233587) 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 as a sum of consecutive naturals, namely, 14116794 + 14116795.

It is an arithmetic number, because the mean of its divisors is an integer number (14116795).

Almost surely, 2^28233589 is an apocalyptic number.

It is an amenable number.

28233589 is a deficient number, since it is larger than the sum of its proper divisors (1).

28233589 is an equidigital number, since it uses as much as digits as its factorization.

28233589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 28233589 is about 5313.5288650764. The cubic root of 28233589 is about 304.5009809943.

The spelling of 28233589 in words is "twenty-eight million, two hundred thirty-three thousand, five hundred eighty-nine".