28076665816 has 16 divisors (see below), whose sum is σ = 52693381440. Its totient is φ = 14025097440.

The previous prime is 28076665753. The next prime is 28076665817. The reversal of 28076665816 is 61856667082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28076665817) 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, 1645416 + ... + 1662391.

It is an arithmetic number, because the mean of its divisors is an integer number (3293336340).

Almost surely, 2^28076665816 is an apocalyptic number.

It is an amenable number.

28076665816 is a deficient number, since it is larger than the sum of its proper divisors (24616715624).

28076665816 is a wasteful number, since it uses less digits than its factorization.

28076665816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308874 (or 3308870 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 28076665816 in words is "twenty-eight billion, seventy-six million, six hundred sixty-five thousand, eight hundred sixteen".