11789988 has 36 divisors (see below), whose sum is σ = 32002992. Its totient is φ = 3368400.

The previous prime is 11789983. The next prime is 11790017. The reversal of 11789988 is 88998711.

It is a self number, because there is not a number n which added to its sum of digits gives 11789988.

It is not an unprimeable number, because it can be changed into a prime (11789983) 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, 9438 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (888972).

Almost surely, 2^11789988 is an apocalyptic number.

It is an amenable number.

11789988 is an abundant number, since it is smaller than the sum of its proper divisors (20213004).

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

11789988 is a wasteful number, since it uses less digits than its factorization.

11789988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20072 (or 20063 counting only the distinct ones).

The product of its digits is 290304, while the sum is 51.

The square root of 11789988 is about 3433.6551952693. The cubic root of 11789988 is about 227.5994042915.

It can be divided in two parts, 11 and 789988, that multiplied together give a palindrome (8689868).

The spelling of 11789988 in words is "eleven million, seven hundred eighty-nine thousand, nine hundred eighty-eight".