28064089 has 4 divisors (see below), whose sum is σ = 28483024. Its totient is φ = 27645156.

The previous prime is 28064063. The next prime is 28064111. The reversal of 28064089 is 98046082.

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 28064089 - 2¹³ = 28055897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28064009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209367 + ... + 209500.

It is an arithmetic number, because the mean of its divisors is an integer number (7120756).

Almost surely, 2^28064089 is an apocalyptic number.

It is an amenable number.

28064089 is a deficient number, since it is larger than the sum of its proper divisors (418935).

28064089 is an equidigital number, since it uses as much as digits as its factorization.

28064089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418934.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 28064089 is about 5297.5550020741. Note that the first 3 decimals coincide. The cubic root of 28064089 is about 303.8904015413.

The spelling of 28064089 in words is "twenty-eight million, sixty-four thousand, eighty-nine".