11728381444 has 48 divisors (see below), whose sum is σ = 23627157120. Its totient is φ = 5051439360.

The previous prime is 11728381417. The next prime is 11728381477. The reversal of 11728381444 is 44418382711.

It is a self number, because there is not a number n which added to its sum of digits gives 11728381444.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70554 + ... + 168625.

It is an arithmetic number, because the mean of its divisors is an integer number (492232440).

Almost surely, 2^11728381444 is an apocalyptic number.

It is an amenable number.

11728381444 is an abundant number, since it is smaller than the sum of its proper divisors (11898775676).

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

11728381444 is a wasteful number, since it uses less digits than its factorization.

11728381444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239260 (or 239258 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The spelling of 11728381444 in words is "eleven billion, seven hundred twenty-eight million, three hundred eighty-one thousand, four hundred forty-four".