4000442042 has 4 divisors (see below), whose sum is σ = 6000663066. Its totient is φ = 2000221020.

The previous prime is 4000442021. The next prime is 4000442129. The reversal of 4000442042 is 2402440004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3148444321 + 851997721 = 56111^2 + 29189^2 .

It is a super-2 number, since 2×4000442042² = 32007073062802259528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000110509 + ... + 1000110512.

Almost surely, 2^4000442042 is an apocalyptic number.

4000442042 is a deficient number, since it is larger than the sum of its proper divisors (2000221024).

4000442042 is a wasteful number, since it uses less digits than its factorization.

4000442042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000221023.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4000442042 is about 63249.0477556777. The cubic root of 4000442042 is about 1587.4595246423.

Adding to 4000442042 its reverse (2402440004), we get a palindrome (6402882046).

The spelling of 4000442042 in words is "four billion, four hundred forty-two thousand, forty-two".