11728889 has 8 divisors (see below), whose sum is σ = 12093120. Its totient is φ = 11367216.

The previous prime is 11728883. The next prime is 11728891. The reversal of 11728889 is 98882711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11728889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12842 + ... + 13724.

It is an arithmetic number, because the mean of its divisors is an integer number (1511640).

Almost surely, 2^11728889 is an apocalyptic number.

It is an amenable number.

11728889 is a deficient number, since it is larger than the sum of its proper divisors (364231).

11728889 is an equidigital number, since it uses as much as digits as its factorization.

11728889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279.

The product of its digits is 64512, while the sum is 44.

The square root of 11728889 is about 3424.7465599662. The cubic root of 11728889 is about 227.2055620146.

The spelling of 11728889 in words is "eleven million, seven hundred twenty-eight thousand, eight hundred eighty-nine".