11211728 has 20 divisors (see below), whose sum is σ = 23697888. Its totient is φ = 5096160.

The previous prime is 11211689. The next prime is 11211749. The reversal of 11211728 is 82711211.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31676 + ... + 32027.

Almost surely, 2^11211728 is an apocalyptic number.

It is an amenable number.

11211728 is an abundant number, since it is smaller than the sum of its proper divisors (12486160).

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

11211728 is a wasteful number, since it uses less digits than its factorization.

11211728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63722 (or 63716 counting only the distinct ones).

The product of its digits is 224, while the sum is 23.

The square root of 11211728 is about 3348.3918528153. The cubic root of 11211728 is about 223.8158563155.

Adding to 11211728 its reverse (82711211), we get a palindrome (93922939).

The spelling of 11211728 in words is "eleven million, two hundred eleven thousand, seven hundred twenty-eight".