11728337780 has 24 divisors (see below), whose sum is σ = 24771883752. Its totient is φ = 4664216192.

The previous prime is 11728337741. The next prime is 11728337801. The reversal of 11728337780 is 8773382711.

11728337780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7154791396 + 4573546384 = 84586^2 + 67628^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1691387 + ... + 1698306.

It is an arithmetic number, because the mean of its divisors is an integer number (1032161823).

Almost surely, 2^11728337780 is an apocalyptic number.

11728337780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11728337780 is an abundant number, since it is smaller than the sum of its proper divisors (13043545972).

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

11728337780 is a wasteful number, since it uses less digits than its factorization.

11728337780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3389875 (or 3389873 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 11728337780 in words is "eleven billion, seven hundred twenty-eight million, three hundred thirty-seven thousand, seven hundred eighty".