28634430784 has 28 divisors (see below), whose sum is σ = 56890763028. Its totient is φ = 14299750400.

The previous prime is 28634430767. The next prime is 28634430857. The reversal of 28634430784 is 48703443682.

It can be written as a sum of positive squares in 2 ways, for example, as 3378864384 + 25255566400 = 58128^2 + 158920^2 .

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, 219937 + ... + 325024.

Almost surely, 2^28634430784 is an apocalyptic number.

It is an amenable number.

28634430784 is a deficient number, since it is larger than the sum of its proper divisors (28256332244).

28634430784 is an equidigital number, since it uses as much as digits as its factorization.

28634430784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545794 (or 545784 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 49.

The spelling of 28634430784 in words is "twenty-eight billion, six hundred thirty-four million, four hundred thirty thousand, seven hundred eighty-four".