43641822 has 64 divisors (see below), whose sum is σ = 111214080. Its totient is φ = 11114496.

The previous prime is 43641799. The next prime is 43641823. The reversal of 43641822 is 22814634.

It is a self number, because there is not a number n which added to its sum of digits gives 43641822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43641823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11958 + ... + 15174.

It is an arithmetic number, because the mean of its divisors is an integer number (1737720).

Almost surely, 2^43641822 is an apocalyptic number.

43641822 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 43641822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55607040).

43641822 is an abundant number, since it is smaller than the sum of its proper divisors (67572258).

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

43641822 is a wasteful number, since it uses less digits than its factorization.

43641822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265.

The product of its digits is 9216, while the sum is 30.

The square root of 43641822 is about 6606.1957282539. The cubic root of 43641822 is about 352.0742730237.

The spelling of 43641822 in words is "forty-three million, six hundred forty-one thousand, eight hundred twenty-two".