11272330728 has 96 divisors (see below), whose sum is σ = 32534611200. Its totient is φ = 3517582464.

The previous prime is 11272330717. The next prime is 11272330733. The reversal of 11272330728 is 82703327211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11272330692 and 11272330701.

It is an unprimeable number.

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, 5418 + ... + 150246.

It is an arithmetic number, because the mean of its divisors is an integer number (338902200).

Almost surely, 2^11272330728 is an apocalyptic number.

11272330728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11272330728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16267305600).

11272330728 is an abundant number, since it is smaller than the sum of its proper divisors (21262280472).

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

11272330728 is a wasteful number, since it uses less digits than its factorization.

11272330728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144911 (or 144904 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

Adding to 11272330728 its reverse (82703327211), we get a palindrome (93975657939).

The spelling of 11272330728 in words is "eleven billion, two hundred seventy-two million, three hundred thirty thousand, seven hundred twenty-eight".