40120320444 has 48 divisors (see below), whose sum is σ = 96287718912. Its totient is φ = 12994716672.

The previous prime is 40120320439. The next prime is 40120320469. The reversal of 40120320444 is 44402302104.

It is a happy number.

It is a super-2 number, since 2×40120320444² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 101844 + ... + 301019.

It is an arithmetic number, because the mean of its divisors is an integer number (2005994144).

Almost surely, 2^40120320444 is an apocalyptic number.

It is an amenable number.

40120320444 is an abundant number, since it is smaller than the sum of its proper divisors (56167398468).

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

40120320444 is a wasteful number, since it uses less digits than its factorization.

40120320444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403106 (or 403104 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 40120320444 its reverse (44402302104), we get a palindrome (84522622548).

The spelling of 40120320444 in words is "forty billion, one hundred twenty million, three hundred twenty thousand, four hundred forty-four".