28331448884 has 6 divisors (see below), whose sum is σ = 49580035554. Its totient is φ = 14165724440.

The previous prime is 28331448881. The next prime is 28331448953. The reversal of 28331448884 is 48884413382.

It can be written as a sum of positive squares in only one way, i.e., 28214592784 + 116856100 = 167972^2 + 10810^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331448881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3541431107 + ... + 3541431114.

It is an arithmetic number, because the mean of its divisors is an integer number (8263339259).

Almost surely, 2^28331448884 is an apocalyptic number.

It is an amenable number.

28331448884 is a deficient number, since it is larger than the sum of its proper divisors (21248586670).

28331448884 is a wasteful number, since it uses less digits than its factorization.

28331448884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7082862225 (or 7082862223 counting only the distinct ones).

The product of its digits is 4718592, while the sum is 53.

The spelling of 28331448884 in words is "twenty-eight billion, three hundred thirty-one million, four hundred forty-eight thousand, eight hundred eighty-four".