28316585778 has 48 divisors (see below), whose sum is σ = 61349037120. Its totient is φ = 8709335232.

The previous prime is 28316585771. The next prime is 28316585807. The reversal of 28316585778 is 87758561382.

28316585778 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28316585771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3913468 + ... + 3920696.

It is an arithmetic number, because the mean of its divisors is an integer number (1278104940).

Almost surely, 2^28316585778 is an apocalyptic number.

28316585778 is an abundant number, since it is smaller than the sum of its proper divisors (33032451342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28316585778 is a wasteful number, since it uses less digits than its factorization.

28316585778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123 (or 11110 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 60.

The spelling of 28316585778 in words is "twenty-eight billion, three hundred sixteen million, five hundred eighty-five thousand, seven hundred seventy-eight".