40004044040 has 32 divisors (see below), whose sum is σ = 91276839360. Its totient is φ = 15776241600.

The previous prime is 40004044027. The next prime is 40004044043. The reversal of 40004044040 is 4044040004.

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

It is not an unprimeable number, because it can be changed into a prime (40004044043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7040126 + ... + 7045805.

It is an arithmetic number, because the mean of its divisors is an integer number (2852401230).

Almost surely, 2^40004044040 is an apocalyptic number.

40004044040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004044040 is an abundant number, since it is smaller than the sum of its proper divisors (51272795320).

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

40004044040 is a wasteful number, since it uses less digits than its factorization.

40004044040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086013 (or 14086009 counting only the distinct ones).

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

Adding to 40004044040 its reverse (4044040004), we get a palindrome (44048084044).

The spelling of 40004044040 in words is "forty billion, four million, forty-four thousand, forty", and thus it is an eban number.