28804642844 has 24 divisors (see below), whose sum is σ = 50496421248. Its totient is φ = 14377119680.

The previous prime is 28804642819. The next prime is 28804642847. The reversal of 28804642844 is 44824640882.

It is a junction number, because it is equal to n+sod(n) for n = 28804642792 and 28804642801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28804642847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8941154 + ... + 8944374.

It is an arithmetic number, because the mean of its divisors is an integer number (2104017552).

Almost surely, 2^28804642844 is an apocalyptic number.

It is an amenable number.

28804642844 is a deficient number, since it is larger than the sum of its proper divisors (21691778404).

28804642844 is a wasteful number, since it uses less digits than its factorization.

28804642844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 6443 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 50.

The spelling of 28804642844 in words is "twenty-eight billion, eight hundred four million, six hundred forty-two thousand, eight hundred forty-four".