40000040042 has 8 divisors (see below), whose sum is σ = 60821978916. Its totient is φ = 19726047072.

The previous prime is 40000040039. The next prime is 40000040077. The reversal of 40000040042 is 24004000004.

It can be written as a sum of positive squares in 2 ways, for example, as 39179847721 + 820192321 = 197939^2 + 28639^2 .

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 = 40000039999 and 40000040026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136986293 + ... + 136986584.

Almost surely, 2^40000040042 is an apocalyptic number.

40000040042 is a deficient number, since it is larger than the sum of its proper divisors (20821938874).

40000040042 is a wasteful number, since it uses less digits than its factorization.

40000040042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273972952.

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 40000040042 its reverse (24004000004), we get a palindrome (64004040046).

The spelling of 40000040042 in words is "forty billion, forty thousand, forty-two", and thus it is an eban number.