28816089 has 4 divisors (see below), whose sum is σ = 38421456. Its totient is φ = 19210724.

The previous prime is 28816069. The next prime is 28816127. The reversal of 28816089 is 98061882.

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 28816089 - 2⁵ = 28816057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28816089.

It is not an unprimeable number, because it can be changed into a prime (28816049) 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, 4802679 + ... + 4802684.

It is an arithmetic number, because the mean of its divisors is an integer number (9605364).

Almost surely, 2^28816089 is an apocalyptic number.

It is an amenable number.

28816089 is a deficient number, since it is larger than the sum of its proper divisors (9605367).

28816089 is an equidigital number, since it uses as much as digits as its factorization.

28816089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605366.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 28816089 is about 5368.0619407753. The cubic root of 28816089 is about 306.5808417412.

The spelling of 28816089 in words is "twenty-eight million, eight hundred sixteen thousand, eighty-nine".