28566665044 has 48 divisors (see below), whose sum is σ = 52037669376. Its totient is φ = 13706985600.

The previous prime is 28566665041. The next prime is 28566665059. The reversal of 28566665044 is 44056666582.

It is a junction number, because it is equal to n+sod(n) for n = 28566664982 and 28566665000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566665041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8083902 + ... + 8087434.

It is an arithmetic number, because the mean of its divisors is an integer number (1084118112).

Almost surely, 2^28566665044 is an apocalyptic number.

It is an amenable number.

28566665044 is a deficient number, since it is larger than the sum of its proper divisors (23471004332).

28566665044 is a wasteful number, since it uses less digits than its factorization.

28566665044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096 (or 4094 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 52.

The spelling of 28566665044 in words is "twenty-eight billion, five hundred sixty-six million, six hundred sixty-five thousand, forty-four".