43994440 has 64 divisors (see below), whose sum is σ = 114773760. Its totient is φ = 14864640.

The previous prime is 43994429. The next prime is 43994449. The reversal of 43994440 is 4449934.

43994440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 43994440.

It is not an unprimeable number, because it can be changed into a prime (43994449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18774 + ... + 20986.

It is an arithmetic number, because the mean of its divisors is an integer number (1793340).

Almost surely, 2^43994440 is an apocalyptic number.

43994440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43994440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57386880).

43994440 is an abundant number, since it is smaller than the sum of its proper divisors (70779320).

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

43994440 is a wasteful number, since it uses less digits than its factorization.

43994440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 43994440 is about 6632.8304667012. The cubic root of 43994440 is about 353.0199626511.

The spelling of 43994440 in words is "forty-three million, nine hundred ninety-four thousand, four hundred forty".