28072265044 has 24 divisors (see below), whose sum is σ = 49863872520. Its totient is φ = 13826934144.

The previous prime is 28072265041. The next prime is 28072265051. The reversal of 28072265044 is 44056227082.

It can be written as a sum of positive squares in 4 ways, for example, as 4359960900 + 23712304144 = 66030^2 + 153988^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28072264988 and 28072265006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28072265041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110659 + ... + 261514.

It is an arithmetic number, because the mean of its divisors is an integer number (2077661355).

Almost surely, 2^28072265044 is an apocalyptic number.

It is an amenable number.

28072265044 is a deficient number, since it is larger than the sum of its proper divisors (21791607476).

28072265044 is a wasteful number, since it uses less digits than its factorization.

28072265044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372459 (or 372457 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 28072265044 in words is "twenty-eight billion, seventy-two million, two hundred sixty-five thousand, forty-four".