28592005644 has 120 divisors (see below), whose sum is σ = 76317125808. Its totient is φ = 9331666560.

The previous prime is 28592005639. The next prime is 28592005661. The reversal of 28592005644 is 44650029582.

28592005644 is a `hidden beast` number, since 2 + 8 + 592 + 0 + 0 + 56 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28592005644.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4483242 + ... + 4489614.

Almost surely, 2^28592005644 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 28592005644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38158562904).

28592005644 is an abundant number, since it is smaller than the sum of its proper divisors (47725120164).

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

28592005644 is a wasteful number, since it uses less digits than its factorization.

28592005644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677 (or 6666 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 28592005644 in words is "twenty-eight billion, five hundred ninety-two million, five thousand, six hundred forty-four".