11985804 has 36 divisors (see below), whose sum is σ = 30453696. Its totient is φ = 3974688.

The previous prime is 11985803. The next prime is 11985811. The reversal of 11985804 is 40858911.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11985803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7282 + ... + 8774.

It is an arithmetic number, because the mean of its divisors is an integer number (845936).

Almost surely, 2^11985804 is an apocalyptic number.

It is an amenable number.

11985804 is an abundant number, since it is smaller than the sum of its proper divisors (18467892).

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

11985804 is a wasteful number, since it uses less digits than its factorization.

11985804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 11985804 is about 3462.0519926772. The cubic root of 11985804 is about 228.8525330903.

The spelling of 11985804 in words is "eleven million, nine hundred eighty-five thousand, eight hundred four".