28984819 has 4 divisors (see below), whose sum is σ = 28996696. Its totient is φ = 28972944.

The previous prime is 28984789. The next prime is 28984831. The reversal of 28984819 is 91848982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28984819 - 2⁷ = 28984691 is a prime.

It is a super-2 number, since 2×28984819² = 1680239464925522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28984849) 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, 789 + ... + 7654.

It is an arithmetic number, because the mean of its divisors is an integer number (7249174).

Almost surely, 2^28984819 is an apocalyptic number.

28984819 is a deficient number, since it is larger than the sum of its proper divisors (11877).

28984819 is an equidigital number, since it uses as much as digits as its factorization.

28984819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11876.

The product of its digits is 331776, while the sum is 49.

The square root of 28984819 is about 5383.7551021569. The cubic root of 28984819 is about 307.1780630483.

The spelling of 28984819 in words is "twenty-eight million, nine hundred eighty-four thousand, eight hundred nineteen".