43691144 has 48 divisors (see below), whose sum is σ = 95910480. Its totient is φ = 18604320.

The previous prime is 43691143. The next prime is 43691149. The reversal of 43691144 is 44119634.

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 43691144.

It is not an unprimeable number, because it can be changed into a prime (43691143) 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, 88739 + ... + 89229.

It is an arithmetic number, because the mean of its divisors is an integer number (1998135).

Almost surely, 2^43691144 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 43691144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47955240).

43691144 is an abundant number, since it is smaller than the sum of its proper divisors (52219336).

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

43691144 is a wasteful number, since it uses less digits than its factorization.

43691144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 727 counting only the distinct ones).

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

The square root of 43691144 is about 6609.9276849297. The cubic root of 43691144 is about 352.2068558604.

The spelling of 43691144 in words is "forty-three million, six hundred ninety-one thousand, one hundred forty-four".