11979309728 has 24 divisors (see below), whose sum is σ = 23882806080. Its totient is φ = 5913835200.

The previous prime is 11979309691. The next prime is 11979309751. The reversal of 11979309728 is 82790397911.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366798 + ... + 2371853.

It is an arithmetic number, because the mean of its divisors is an integer number (995116920).

Almost surely, 2^11979309728 is an apocalyptic number.

It is an amenable number.

11979309728 is a deficient number, since it is larger than the sum of its proper divisors (11903496352).

11979309728 is an equidigital number, since it uses as much as digits as its factorization.

11979309728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738740 (or 4738732 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 11979309728 in words is "eleven billion, nine hundred seventy-nine million, three hundred nine thousand, seven hundred twenty-eight".