11817984 has 44 divisors (see below), whose sum is σ = 31507424. Its totient is φ = 3938304.

The previous prime is 11817983. The next prime is 11817997. The reversal of 11817984 is 48971811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11817983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149 + ... + 4995.

Almost surely, 2^11817984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11817984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15753712).

11817984 is an abundant number, since it is smaller than the sum of its proper divisors (19689440).

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

11817984 is an equidigital number, since it uses as much as digits as its factorization.

11817984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870 (or 3852 counting only the distinct ones).

The product of its digits is 16128, while the sum is 39.

The square root of 11817984 is about 3437.7294832491. The cubic root of 11817984 is about 227.7794111501.

The spelling of 11817984 in words is "eleven million, eight hundred seventeen thousand, nine hundred eighty-four".