11556889 has 8 divisors (see below), whose sum is σ = 12267720. Its totient is φ = 10849536.

The previous prime is 11556859. The next prime is 11556907. The reversal of 11556889 is 98865511.

11556889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 267289 + 11289600 = 517^2 + 3360^2 .

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

It is not a de Polignac number, because 11556889 - 2¹³ = 11548697 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11556829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9867 + ... + 10975.

It is an arithmetic number, because the mean of its divisors is an integer number (1533465).

Almost surely, 2^11556889 is an apocalyptic number.

It is an amenable number.

11556889 is a deficient number, since it is larger than the sum of its proper divisors (710831).

11556889 is a wasteful number, since it uses less digits than its factorization.

11556889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

The product of its digits is 86400, while the sum is 43.

The square root of 11556889 is about 3399.5424692155. The cubic root of 11556889 is about 226.0894586717.

The spelling of 11556889 in words is "eleven million, five hundred fifty-six thousand, eight hundred eighty-nine".