28186794312 has 32 divisors (see below), whose sum is σ = 70933663680. Its totient is φ = 9333374400.

The previous prime is 28186794247. The next prime is 28186794347. The reversal of 28186794312 is 21349768182.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3885283 + ... + 3892530.

It is an arithmetic number, because the mean of its divisors is an integer number (2216676990).

Almost surely, 2^28186794312 is an apocalyptic number.

It is an amenable number.

28186794312 is an abundant number, since it is smaller than the sum of its proper divisors (42746869368).

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

28186794312 is a wasteful number, since it uses less digits than its factorization.

28186794312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777973 (or 7777969 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The spelling of 28186794312 in words is "twenty-eight billion, one hundred eighty-six million, seven hundred ninety-four thousand, three hundred twelve".