28287618784 has 24 divisors (see below), whose sum is σ = 55955202408. Its totient is φ = 14076773760.

The previous prime is 28287618781. The next prime is 28287618791. The reversal of 28287618784 is 48781678282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287618781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088007 + ... + 2101510.

It is an arithmetic number, because the mean of its divisors is an integer number (2331466767).

Almost surely, 2^28287618784 is an apocalyptic number.

It is an amenable number.

28287618784 is a deficient number, since it is larger than the sum of its proper divisors (27667583624).

28287618784 is a wasteful number, since it uses less digits than its factorization.

28287618784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189738 (or 4189730 counting only the distinct ones).

The product of its digits is 19267584, while the sum is 61.

The spelling of 28287618784 in words is "twenty-eight billion, two hundred eighty-seven million, six hundred eighteen thousand, seven hundred eighty-four".