40443020 has 48 divisors (see below), whose sum is σ = 90720000. Its totient is φ = 15099840.

The previous prime is 40443019. The next prime is 40443041. The reversal of 40443020 is 2034404.

It is a self number, because there is not a number n which added to its sum of digits gives 40443020.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26231 + ... + 27729.

It is an arithmetic number, because the mean of its divisors is an integer number (1890000).

Almost surely, 2^40443020 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 40443020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45360000).

40443020 is an abundant number, since it is smaller than the sum of its proper divisors (50276980).

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

40443020 is a wasteful number, since it uses less digits than its factorization.

40443020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40443020 is about 6359.4826833635. The cubic root of 40443020 is about 343.2531457771.

Adding to 40443020 its reverse (2034404), we get a palindrome (42477424).

The spelling of 40443020 in words is "forty million, four hundred forty-three thousand, twenty".