28816747 has 4 divisors (see below), whose sum is σ = 29595616. Its totient is φ = 28037880.

The previous prime is 28816703. The next prime is 28816759. The reversal of 28816747 is 74761882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28816747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28816247) 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, 389379 + ... + 389452.

It is an arithmetic number, because the mean of its divisors is an integer number (7398904).

Almost surely, 2^28816747 is an apocalyptic number.

28816747 is a deficient number, since it is larger than the sum of its proper divisors (778869).

28816747 is an equidigital number, since it uses as much as digits as its factorization.

28816747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778868.

The product of its digits is 150528, while the sum is 43.

The square root of 28816747 is about 5368.1232288389. The cubic root of 28816747 is about 306.5831752600.

The spelling of 28816747 in words is "twenty-eight million, eight hundred sixteen thousand, seven hundred forty-seven".