28280871884 has 6 divisors (see below), whose sum is σ = 49491525804. Its totient is φ = 14140435940.

The previous prime is 28280871881. The next prime is 28280871889. The reversal of 28280871884 is 48817808282.

It is not an unprimeable number, because it can be changed into a prime (28280871881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3535108982 + ... + 3535108989.

It is an arithmetic number, because the mean of its divisors is an integer number (8248587634).

Almost surely, 2^28280871884 is an apocalyptic number.

It is an amenable number.

28280871884 is a deficient number, since it is larger than the sum of its proper divisors (21210653920).

28280871884 is a wasteful number, since it uses less digits than its factorization.

28280871884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070217975 (or 7070217973 counting only the distinct ones).

The product of its (nonzero) digits is 3670016, while the sum is 56.

The spelling of 28280871884 in words is "twenty-eight billion, two hundred eighty million, eight hundred seventy-one thousand, eight hundred eighty-four".