28287344444 has 12 divisors (see below), whose sum is σ = 50341884600. Its totient is φ = 13903948848.

The previous prime is 28287344441. The next prime is 28287344447. The reversal of 28287344444 is 44444378282.

It is an interprime number because it is at equal distance from previous prime (28287344441) and next prime (28287344447).

It is a junction number, because it is equal to n+sod(n) for n = 28287344392 and 28287344401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287344441) 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 3 ways as a sum of consecutive naturals, for example, 59930579 + ... + 59931050.

It is an arithmetic number, because the mean of its divisors is an integer number (4195157050).

Almost surely, 2^28287344444 is an apocalyptic number.

It is an amenable number.

28287344444 is a deficient number, since it is larger than the sum of its proper divisors (22054540156).

28287344444 is a wasteful number, since it uses less digits than its factorization.

28287344444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119861692 (or 119861690 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 50.

The spelling of 28287344444 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred forty-four thousand, four hundred forty-four".