11555889 has 16 divisors (see below), whose sum is σ = 15759360. Its totient is φ = 7530320.

The previous prime is 11555783. The next prime is 11555909. The reversal of 11555889 is 98855511.

It is a cyclic number.

It is not a de Polignac number, because 11555889 - 2⁸ = 11555633 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11555889.

It is not an unprimeable number, because it can be changed into a prime (11555689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48232 + ... + 48470.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^11555889 is an apocalyptic number.

It is an amenable number.

11555889 is a deficient number, since it is larger than the sum of its proper divisors (4203471).

11555889 is a wasteful number, since it uses less digits than its factorization.

11555889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540.

The product of its digits is 72000, while the sum is 42.

The square root of 11555889 is about 3399.3953874182. The cubic root of 11555889 is about 226.0829374248.

The spelling of 11555889 in words is "eleven million, five hundred fifty-five thousand, eight hundred eighty-nine".