11728184220 has 72 divisors (see below), whose sum is σ = 35587188000. Its totient is φ = 3126487680.

The previous prime is 11728184177. The next prime is 11728184227. The reversal of 11728184220 is 2248182711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728184227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 651906 + ... + 669654.

It is an arithmetic number, because the mean of its divisors is an integer number (494266500).

Almost surely, 2^11728184220 is an apocalyptic number.

11728184220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11728184220 is an abundant number, since it is smaller than the sum of its proper divisors (23859003780).

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

11728184220 is a wasteful number, since it uses less digits than its factorization.

11728184220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21435 (or 21430 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The spelling of 11728184220 in words is "eleven billion, seven hundred twenty-eight million, one hundred eighty-four thousand, two hundred twenty".