28078560686 has 16 divisors (see below), whose sum is σ = 46007139888. Its totient is φ = 12746203200.

The previous prime is 28078560673. The next prime is 28078560721. The reversal of 28078560686 is 68606587082.

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 7 ways as a sum of consecutive naturals, for example, 821825 + ... + 855308.

It is an arithmetic number, because the mean of its divisors is an integer number (2875446243).

Almost surely, 2^28078560686 is an apocalyptic number.

28078560686 is a deficient number, since it is larger than the sum of its proper divisors (17928579202).

28078560686 is a wasteful number, since it uses less digits than its factorization.

28078560686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677907.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 28078560686 in words is "twenty-eight billion, seventy-eight million, five hundred sixty thousand, six hundred eighty-six".