40404440020 has 96 divisors (see below), whose sum is σ = 100624398336. Its totient is φ = 13340073600.

The previous prime is 40404439993. The next prime is 40404440029. The reversal of 40404440020 is 2004440404.

It is a junction number, because it is equal to n+sod(n) for n = 40404439973 and 40404440000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40404440029) 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, 380155 + ... + 474685.

It is an arithmetic number, because the mean of its divisors is an integer number (1048170816).

Almost surely, 2^40404440020 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 40404440020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50312199168).

40404440020 is an abundant number, since it is smaller than the sum of its proper divisors (60219958316).

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

40404440020 is a wasteful number, since it uses less digits than its factorization.

40404440020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94661 (or 94659 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 40404440020 its reverse (2004440404), we get a palindrome (42408880424).

The spelling of 40404440020 in words is "forty billion, four hundred four million, four hundred forty thousand, twenty".