11643944 has 32 divisors (see below), whose sum is σ = 23761920. Its totient is φ = 5317056.

The previous prime is 11643923. The next prime is 11643949. The reversal of 11643944 is 44934611.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11643944.

It is not an unprimeable number, because it can be changed into a prime (11643949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10169 + ... + 11255.

It is an arithmetic number, because the mean of its divisors is an integer number (742560).

Almost surely, 2^11643944 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 11643944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11880960).

11643944 is an abundant number, since it is smaller than the sum of its proper divisors (12117976).

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

11643944 is a wasteful number, since it uses less digits than its factorization.

11643944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1205 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 11643944 is about 3412.3223763296. The cubic root of 11643944 is about 226.6557299606.

The spelling of 11643944 in words is "eleven million, six hundred forty-three thousand, nine hundred forty-four".