43841664 has 96 divisors (see below), whose sum is σ = 132865200. Its totient is φ = 13837824.

The previous prime is 43841663. The next prime is 43841671. The reversal of 43841664 is 46614834.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (43841663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20887 + ... + 22889.

Almost surely, 2^43841664 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 43841664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66432600).

43841664 is an abundant number, since it is smaller than the sum of its proper divisors (89023536).

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

43841664 is a wasteful number, since it uses less digits than its factorization.

43841664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2027 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 43841664 is about 6621.3037991018. The cubic root of 43841664 is about 352.6108539234.

The spelling of 43841664 in words is "forty-three million, eight hundred forty-one thousand, six hundred sixty-four".