28786668782 has 8 divisors (see below), whose sum is σ = 43994720376. Its totient is φ = 14121761992.

The previous prime is 28786668767. The next prime is 28786668821.

28786668782 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135786068 + ... + 135786279.

It is an arithmetic number, because the mean of its divisors is an integer number (5499340047).

Almost surely, 2^28786668782 is an apocalyptic number.

28786668782 is a deficient number, since it is larger than the sum of its proper divisors (15208051594).

28786668782 is a wasteful number, since it uses less digits than its factorization.

28786668782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271572402.

The product of its digits is 173408256, while the sum is 68.

The spelling of 28786668782 in words is "twenty-eight billion, seven hundred eighty-six million, six hundred sixty-eight thousand, seven hundred eighty-two".