3999904042 has 8 divisors (see below), whose sum is σ = 6000881796. Its totient is φ = 1999610112.

The previous prime is 3999904037. The next prime is 3999904043. The reversal of 3999904042 is 2404099993.

It can be written as a sum of positive squares in 2 ways, for example, as 3370847481 + 629056561 = 58059^2 + 25081^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3999904043) by changing a digit.

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, 156073 + ... + 179884.

Almost surely, 2^3999904042 is an apocalyptic number.

3999904042 is a deficient number, since it is larger than the sum of its proper divisors (2000977754).

3999904042 is a wasteful number, since it uses less digits than its factorization.

3999904042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341912.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 3999904042 is about 63244.7945842185. The cubic root of 3999904042 is about 1587.3883582142.

The spelling of 3999904042 in words is "three billion, nine hundred ninety-nine million, nine hundred four thousand, forty-two".