11988605 has 8 divisors (see below), whose sum is σ = 14737464. Its totient is φ = 9356800.

The previous prime is 11988577. The next prime is 11988607. The reversal of 11988605 is 50688911.

11988605 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 1406596 + 10582009 = 1186^2 + 3253^2 .

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

It is not a de Polignac number, because 11988605 - 2⁶ = 11988541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988607) 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, 29036 + ... + 29445.

It is an arithmetic number, because the mean of its divisors is an integer number (1842183).

Almost surely, 2^11988605 is an apocalyptic number.

It is an amenable number.

11988605 is a deficient number, since it is larger than the sum of its proper divisors (2748859).

11988605 is an equidigital number, since it uses as much as digits as its factorization.

11988605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58527.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 11988605 is about 3462.4564979217. The cubic root of 11988605 is about 228.8703587897.

The spelling of 11988605 in words is "eleven million, nine hundred eighty-eight thousand, six hundred five".