11431728 has 120 divisors (see below), whose sum is σ = 39926016. Its totient is φ = 2966400.

The previous prime is 11431709. The next prime is 11431733. The reversal of 11431728 is 82713411.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10573 + ... + 11603.

Almost surely, 2^11431728 is an apocalyptic number.

11431728 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 11431728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19963008).

11431728 is an abundant number, since it is smaller than the sum of its proper divisors (28494288).

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

11431728 is a wasteful number, since it uses less digits than its factorization.

11431728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063 (or 1054 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 11431728 is about 3381.0838498919. The cubic root of 11431728 is about 225.2703121574.

The spelling of 11431728 in words is "eleven million, four hundred thirty-one thousand, seven hundred twenty-eight".