40042404242 has 8 divisors (see below), whose sum is σ = 60064795836. Its totient is φ = 20020805632.

The previous prime is 40042404191. The next prime is 40042404257. The reversal of 40042404242 is 24240424004.

It can be written as a sum of positive squares in 2 ways, for example, as 33748996681 + 6293407561 = 183709^2 + 79331^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49763 + ... + 287334.

Almost surely, 2^40042404242 is an apocalyptic number.

40042404242 is a deficient number, since it is larger than the sum of its proper divisors (20022391594).

40042404242 is a wasteful number, since it uses less digits than its factorization.

40042404242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396492.

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

Adding to 40042404242 its reverse (24240424004), we get a palindrome (64282828246).

The spelling of 40042404242 in words is "forty billion, forty-two million, four hundred four thousand, two hundred forty-two".