28056444786 has 96 divisors (see below), whose sum is σ = 63510220800. Its totient is φ = 8941363200.

The previous prime is 28056444781. The next prime is 28056444827. The reversal of 28056444786 is 68744465082.

It is a happy number.

28056444786 is a `hidden beast` number, since 2 + 8 + 0 + 564 + 4 + 4 + 78 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (28056444781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28310751 + ... + 28311741.

It is an arithmetic number, because the mean of its divisors is an integer number (661564800).

Almost surely, 2^28056444786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28056444786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31755110400).

28056444786 is an abundant number, since it is smaller than the sum of its proper divisors (35453776014).

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

28056444786 is a wasteful number, since it uses less digits than its factorization.

28056444786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 28056444786 in words is "twenty-eight billion, fifty-six million, four hundred forty-four thousand, seven hundred eighty-six".