40431240440 has 16 divisors (see below), whose sum is σ = 90970291080. Its totient is φ = 16172496160.

The previous prime is 40431240433. The next prime is 40431240463. The reversal of 40431240440 is 4404213404.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505390466 + ... + 505390545.

Almost surely, 2^40431240440 is an apocalyptic number.

40431240440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40431240440 is an abundant number, since it is smaller than the sum of its proper divisors (50539050640).

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

40431240440 is a wasteful number, since it uses less digits than its factorization.

40431240440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010781022 (or 1010781018 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 40431240440 its reverse (4404213404), we get a palindrome (44835453844).

The spelling of 40431240440 in words is "forty billion, four hundred thirty-one million, two hundred forty thousand, four hundred forty".