4004000642 has 16 divisors (see below), whose sum is σ = 6200076960. Its totient is φ = 1938132672.

The previous prime is 4004000617. The next prime is 4004000647. The reversal of 4004000642 is 2460004004.

It is a super-2 number, since 2×4004000642² = 32064042282272824328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4004000647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196292 + ... + 215727.

It is an arithmetic number, because the mean of its divisors is an integer number (387504810).

Almost surely, 2^4004000642 is an apocalyptic number.

4004000642 is a deficient number, since it is larger than the sum of its proper divisors (2196076318).

4004000642 is a wasteful number, since it uses less digits than its factorization.

4004000642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412177.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4004000642 is about 63277.1731511451. The cubic root of 4004000642 is about 1587.9300942416.

Adding to 4004000642 its reverse (2460004004), we get a palindrome (6464004646).

The spelling of 4004000642 in words is "four billion, four million, six hundred forty-two", and thus it is an aban number.