11809944 has 96 divisors (see below), whose sum is σ = 34398000. Its totient is φ = 3649536.

The previous prime is 11809943. The next prime is 11809949. The reversal of 11809944 is 44990811.

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

It is a junction number, because it is equal to n+sod(n) for n = 11809899 and 11809908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121704 + ... + 121800.

Almost surely, 2^11809944 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 11809944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17199000).

11809944 is an abundant number, since it is smaller than the sum of its proper divisors (22588056).

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

11809944 is a wasteful number, since it uses less digits than its factorization.

11809944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11809944 is about 3436.5599078148. The cubic root of 11809944 is about 227.7277452054.

The spelling of 11809944 in words is "eleven million, eight hundred nine thousand, nine hundred forty-four".