40040040440 has 16 divisors (see below), whose sum is σ = 90090091080. Its totient is φ = 16016016160.

The previous prime is 40040040437. The next prime is 40040040461. The reversal of 40040040440 is 4404004004.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500500466 + ... + 500500545.

Almost surely, 2^40040040440 is an apocalyptic number.

40040040440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040040440 is an abundant number, since it is smaller than the sum of its proper divisors (50050050640).

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

40040040440 is a wasteful number, since it uses less digits than its factorization.

40040040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001001022 (or 1001001018 counting only the distinct ones).

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

Adding to 40040040440 its reverse (4404004004), we get a palindrome (44444044444).

The spelling of 40040040440 in words is "forty billion, forty million, forty thousand, four hundred forty".