40040004440 has 16 divisors (see below), whose sum is σ = 90090010080. Its totient is φ = 16016001760.

The previous prime is 40040004419. The next prime is 40040004451. The reversal of 40040004440 is 4440004004.

40040004440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500500016 + ... + 500500095.

It is an arithmetic number, because the mean of its divisors is an integer number (5630625630).

Almost surely, 2^40040004440 is an apocalyptic number.

40040004440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040004440 is an abundant number, since it is smaller than the sum of its proper divisors (50050005640).

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

40040004440 is a wasteful number, since it uses less digits than its factorization.

40040004440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001000122 (or 1001000118 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40040004440 its reverse (4440004004), we get a palindrome (44480008444).

The spelling of 40040004440 in words is "forty billion, forty million, four thousand, four hundred forty".