11701728 has 72 divisors (see below), whose sum is σ = 34122816. Its totient is φ = 3801600.

The previous prime is 11701721. The next prime is 11701741. The reversal of 11701728 is 82710711.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11701721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11313 + ... + 12303.

It is an arithmetic number, because the mean of its divisors is an integer number (473928).

Almost surely, 2^11701728 is an apocalyptic number.

11701728 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 11701728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17061408).

11701728 is an abundant number, since it is smaller than the sum of its proper divisors (22421088).

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

11701728 is a wasteful number, since it uses less digits than its factorization.

11701728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 11701728 is about 3420.7788586812. The cubic root of 11701728 is about 227.0300438283.

The spelling of 11701728 in words is "eleven million, seven hundred one thousand, seven hundred twenty-eight".