43722240 has 80 divisors (see below), whose sum is σ = 139799088. Its totient is φ = 11657216.

The previous prime is 43722209. The next prime is 43722293. The reversal of 43722240 is 4222734.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 43722240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4834 + ... + 10526.

Almost surely, 2^43722240 is an apocalyptic number.

43722240 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 43722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69899544).

43722240 is an abundant number, since it is smaller than the sum of its proper divisors (96076848).

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

43722240 is an equidigital number, since it uses as much as digits as its factorization.

43722240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5719 (or 5703 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 43722240 is about 6612.2794859262. The cubic root of 43722240 is about 352.2903939729.

Adding to 43722240 its reverse (4222734), we get a palindrome (47944974).

The spelling of 43722240 in words is "forty-three million, seven hundred twenty-two thousand, two hundred forty".