11728339940 has 24 divisors (see below), whose sum is σ = 24631803000. Its totient is φ = 4690899968.

The previous prime is 11728339939. The next prime is 11728339981. The reversal of 11728339940 is 4993382711.

It can be written as a sum of positive squares in 4 ways, for example, as 2277389284 + 9450950656 = 47722^2 + 97216^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275186 + ... + 314934.

It is an arithmetic number, because the mean of its divisors is an integer number (1026325125).

Almost surely, 2^11728339940 is an apocalyptic number.

11728339940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11728339940 is an abundant number, since it is smaller than the sum of its proper divisors (12903463060).

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

11728339940 is a wasteful number, since it uses less digits than its factorization.

11728339940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54511 (or 54509 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 11728339940 in words is "eleven billion, seven hundred twenty-eight million, three hundred thirty-nine thousand, nine hundred forty".