28816447 has 8 divisors (see below), whose sum is σ = 32803200. Its totient is φ = 25057560.

The previous prime is 28816423. The next prime is 28816457. The reversal of 28816447 is 74461882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28816447 - 2¹⁵ = 28783679 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 (28816457) 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 7 ways as a sum of consecutive naturals, for example, 56697 + ... + 57202.

It is an arithmetic number, because the mean of its divisors is an integer number (4100400).

Almost surely, 2^28816447 is an apocalyptic number.

28816447 is a deficient number, since it is larger than the sum of its proper divisors (3986753).

28816447 is a wasteful number, since it uses less digits than its factorization.

28816447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113933.

The product of its digits is 86016, while the sum is 40.

The square root of 28816447 is about 5368.0952860395. The cubic root of 28816447 is about 306.5821113501.

The spelling of 28816447 in words is "twenty-eight million, eight hundred sixteen thousand, four hundred forty-seven".