28363844884 has 12 divisors (see below), whose sum is σ = 50148448084. Its totient is φ = 14035716864.

The previous prime is 28363844863. The next prime is 28363844921. The reversal of 28363844884 is 48844836382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16712801284 + 11651043600 = 129278^2 + 107940^2 .

It is a super-2 number, since 2×28363844884² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 36550959 + ... + 36551734.

Almost surely, 2^28363844884 is an apocalyptic number.

It is an amenable number.

28363844884 is a deficient number, since it is larger than the sum of its proper divisors (21784603200).

28363844884 is a wasteful number, since it uses less digits than its factorization.

28363844884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73102794 (or 73102792 counting only the distinct ones).

The product of its digits is 28311552, while the sum is 58.

The spelling of 28363844884 in words is "twenty-eight billion, three hundred sixty-three million, eight hundred forty-four thousand, eight hundred eighty-four".