12194417728 has 28 divisors (see below), whose sum is σ = 24420314380. Its totient is φ = 6041267712.

The previous prime is 12194417723. The next prime is 12194417737. The reversal of 12194417728 is 82771449121.

It can be written as a sum of positive squares in 2 ways, for example, as 4906722304 + 7287695424 = 70048^2 + 85368^2 .

It is not an unprimeable number, because it can be changed into a prime (12194417723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867051 + ... + 881002.

It is an arithmetic number, because the mean of its divisors is an integer number (872154085).

Almost surely, 2^12194417728 is an apocalyptic number.

It is an amenable number.

12194417728 is an abundant number, since it is smaller than the sum of its proper divisors (12225896652).

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

12194417728 is a wasteful number, since it uses less digits than its factorization.

12194417728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748174 (or 1748164 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The spelling of 12194417728 in words is "twelve billion, one hundred ninety-four million, four hundred seventeen thousand, seven hundred twenty-eight".