28816567 has 4 divisors (see below), whose sum is σ = 31033240. Its totient is φ = 26599896.

The previous prime is 28816561. The next prime is 28816589. The reversal of 28816567 is 76561882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28816567 - 2¹¹ = 28814519 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 (28816561) 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 in 3 ways as a sum of consecutive naturals, for example, 1108317 + ... + 1108342.

It is an arithmetic number, because the mean of its divisors is an integer number (7758310).

Almost surely, 2^28816567 is an apocalyptic number.

28816567 is a deficient number, since it is larger than the sum of its proper divisors (2216673).

28816567 is a wasteful number, since it uses less digits than its factorization.

28816567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216672.

The product of its digits is 161280, while the sum is 43.

The square root of 28816567 is about 5368.1064631768. The cubic root of 28816567 is about 306.5825369149.

The spelling of 28816567 in words is "twenty-eight million, eight hundred sixteen thousand, five hundred sixty-seven".