43444140 has 96 divisors (see below), whose sum is σ = 125846784. Its totient is φ = 11193600.

The previous prime is 43444111. The next prime is 43444151. The reversal of 43444140 is 4144434.

It is a self number, because there is not a number n which added to its sum of digits gives 43444140.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405967 + ... + 406073.

It is an arithmetic number, because the mean of its divisors is an integer number (1310904).

Almost surely, 2^43444140 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 43444140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62923392).

43444140 is an abundant number, since it is smaller than the sum of its proper divisors (82402644).

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

43444140 is a wasteful number, since it uses less digits than its factorization.

43444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 43444140 is about 6591.2168830953. The cubic root of 43444140 is about 351.5418777632.

Adding to 43444140 its reverse (4144434), we get a palindrome (47588574).

The spelling of 43444140 in words is "forty-three million, four hundred forty-four thousand, one hundred forty".