28716849 has 20 divisors (see below), whose sum is σ = 49027264. Its totient is φ = 16409304.

The previous prime is 28716841. The next prime is 28716899. The reversal of 28716849 is 94861782.

It is not a de Polignac number, because 28716849 - 2³ = 28716841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28716841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24757 + ... + 25890.

Almost surely, 2^28716849 is an apocalyptic number.

It is an amenable number.

28716849 is a deficient number, since it is larger than the sum of its proper divisors (20310415).

28716849 is an equidigital number, since it uses as much as digits as its factorization.

28716849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50666 (or 50657 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 28716849 is about 5358.8104090367. The cubic root of 28716849 is about 306.2284913952.

The spelling of 28716849 in words is "twenty-eight million, seven hundred sixteen thousand, eight hundred forty-nine".