11321728 has 96 divisors (see below), whose sum is σ = 26860680. Its totient is φ = 4730880.

The previous prime is 11321719. The next prime is 11321729. The reversal of 11321728 is 82712311.

It is a happy number.

Its product of digits (672) is a multiple of the sum of its prime factors (96).

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263275 + ... + 263317.

Almost surely, 2^11321728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11321728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13430340).

11321728 is an abundant number, since it is smaller than the sum of its proper divisors (15538952).

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

11321728 is a wasteful number, since it uses less digits than its factorization.

11321728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 73 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The square root of 11321728 is about 3364.7775557977. Note that the first 3 decimals coincide. The cubic root of 11321728 is about 224.5454394856.

The spelling of 11321728 in words is "eleven million, three hundred twenty-one thousand, seven hundred twenty-eight".