40040244404020 has 72 divisors (see below), whose sum is σ = 98709960583080. Its totient is φ = 13602138036480.

The previous prime is 40040244403969. The next prime is 40040244404143. The reversal of 40040244404020 is 2040444204004.

It can be written as a sum of positive squares in 4 ways, for example, as 8804620038564 + 31235624365456 = 2967258^2 + 5588884^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 40040244404020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187312411 + ... + 187526050.

It is an arithmetic number, because the mean of its divisors is an integer number (1370971674765).

Almost surely, 2^{40040244404020} is an apocalyptic number.

It is an amenable number.

40040244404020 is an abundant number, since it is smaller than the sum of its proper divisors (58669716179060).

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

40040244404020 is a wasteful number, since it uses less digits than its factorization.

40040244404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374838593 (or 374838584 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 40040244404020 its reverse (2040444204004), we get a palindrome (42080688608024).

The spelling of 40040244404020 in words is "forty trillion, forty billion, two hundred forty-four million, four hundred four thousand, twenty".