43201440 has 144 divisors (see below), whose sum is σ = 155282400. Its totient is φ = 10907136.

The previous prime is 43201427. The next prime is 43201447. The reversal of 43201440 is 4410234.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (43201447) 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 23 ways as a sum of consecutive naturals, for example, 26571 + ... + 28149.

It is an arithmetic number, because the mean of its divisors is an integer number (1078350).

Almost surely, 2^43201440 is an apocalyptic number.

43201440 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 43201440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77641200).

43201440 is an abundant number, since it is smaller than the sum of its proper divisors (112080960).

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

43201440 is a wasteful number, since it uses less digits than its factorization.

43201440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 43201440 is about 6572.7802336606. The cubic root of 43201440 is about 350.8860272325.

Adding to 43201440 its reverse (4410234), we get a palindrome (47611674).

The spelling of 43201440 in words is "forty-three million, two hundred one thousand, four hundred forty".