28055679808 has 112 divisors (see below), whose sum is σ = 61016138064. Its totient is φ = 12721766400.

The previous prime is 28055679787. The next prime is 28055679809. The reversal of 28055679808 is 80897655082.

It can be written as a sum of positive squares in 8 ways, for example, as 4509391104 + 23546288704 = 67152^2 + 153448^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055679809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11511166 + ... + 11513602.

It is an arithmetic number, because the mean of its divisors is an integer number (544786947).

Almost surely, 2^28055679808 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 28055679808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30508069032).

28055679808 is an abundant number, since it is smaller than the sum of its proper divisors (32960458256).

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

28055679808 is a wasteful number, since it uses less digits than its factorization.

28055679808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 28055679808 in words is "twenty-eight billion, fifty-five million, six hundred seventy-nine thousand, eight hundred eight".