28320641104 has 80 divisors (see below), whose sum is σ = 65606800896. Its totient is φ = 11589350400.

The previous prime is 28320641081. The next prime is 28320641117. The reversal of 28320641104 is 40114602382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150214 + ... + 281434.

Almost surely, 2^28320641104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28320641104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32803400448).

28320641104 is an abundant number, since it is smaller than the sum of its proper divisors (37286159792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28320641104 is a wasteful number, since it uses less digits than its factorization.

28320641104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131324 (or 131318 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 28320641104 in words is "twenty-eight billion, three hundred twenty million, six hundred forty-one thousand, one hundred four".