28056326445 has 48 divisors (see below), whose sum is σ = 56933839872. Its totient is φ = 12512920320.

The previous prime is 28056326437. The next prime is 28056326449. The reversal of 28056326445 is 54462365082.

28056326445 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 632 + 6 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 28056326445 - 2³ = 28056326437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28056326445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056326449) 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, 1073277 + ... + 1099106.

It is an arithmetic number, because the mean of its divisors is an integer number (1186121664).

Almost surely, 2^28056326445 is an apocalyptic number.

It is an amenable number.

28056326445 is an abundant number, since it is smaller than the sum of its proper divisors (28877513427).

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

28056326445 is a wasteful number, since it uses less digits than its factorization.

28056326445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172442 (or 2172439 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 28056326445 in words is "twenty-eight billion, fifty-six million, three hundred twenty-six thousand, four hundred forty-five".