28442198872 has 8 divisors (see below), whose sum is σ = 53329122900. Its totient is φ = 14221099432.

The previous prime is 28442198819. The next prime is 28442198927. The reversal of 28442198872 is 27889124482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1777637422 + ... + 1777637437.

Almost surely, 2^28442198872 is an apocalyptic number.

It is an amenable number.

28442198872 is a deficient number, since it is larger than the sum of its proper divisors (24886924028).

28442198872 is a wasteful number, since it uses less digits than its factorization.

28442198872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555274865 (or 3555274861 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The spelling of 28442198872 in words is "twenty-eight billion, four hundred forty-two million, one hundred ninety-eight thousand, eight hundred seventy-two".