440531004660540 has 48 divisors (see below), whose sum is σ = 1233562309203840. Its totient is φ = 117467744466240.

The previous prime is 440531004660529. The next prime is 440531004660673. The reversal of 440531004660540 is 45066400135044.

It is a junction number, because it is equal to n+sod(n) for n = 440531004660492 and 440531004660501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223702426 + ... + 225663105.

It is an arithmetic number, because the mean of its divisors is an integer number (25699214775080).

Almost surely, 2^{440531004660540} is an apocalyptic number.

It is an amenable number.

440531004660540 is an abundant number, since it is smaller than the sum of its proper divisors (793031304543300).

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

440531004660540 is a wasteful number, since it uses less digits than its factorization.

440531004660540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449381882 (or 449381880 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 440531004660540 its reverse (45066400135044), we get a palindrome (485597404795584).

The spelling of 440531004660540 in words is "four hundred forty trillion, five hundred thirty-one billion, four million, six hundred sixty thousand, five hundred forty".