40404440042 has 8 divisors (see below), whose sum is σ = 60608259396. Its totient is φ = 20201686912.

The previous prime is 40404440029. The next prime is 40404440047. The reversal of 40404440042 is 24004440404.

It is a happy number.

40404440042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28183358641 + 12221081401 = 167879^2 + 110549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 40404439993 and 40404440020.

It is not an unprimeable number, because it can be changed into a prime (40404440047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163913 + ... + 328140.

Almost surely, 2^40404440042 is an apocalyptic number.

40404440042 is a deficient number, since it is larger than the sum of its proper divisors (20203819354).

40404440042 is a wasteful number, since it uses less digits than its factorization.

40404440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533112.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 40404440042 its reverse (24004440404), we get a palindrome (64408880446).

The spelling of 40404440042 in words is "forty billion, four hundred four million, four hundred forty thousand, forty-two".