3994005005 has 16 divisors (see below), whose sum is σ = 4956142464. Its totient is φ = 3088113600.

The previous prime is 3994004957. The next prime is 3994005049. The reversal of 3994005005 is 5005004993.

3994005005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3994005005 - 2²⁴ = 3977227789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94721 + ... + 130230.

It is an arithmetic number, because the mean of its divisors is an integer number (309758904).

Almost surely, 2^3994005005 is an apocalyptic number.

It is an amenable number.

3994005005 is a deficient number, since it is larger than the sum of its proper divisors (962137459).

3994005005 is a wasteful number, since it uses less digits than its factorization.

3994005005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225076.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 3994005005 is about 63198.1408349961. The cubic root of 3994005005 is about 1586.6076170021.

Adding to 3994005005 its reverse (5005004993), we get a palindrome (8999009998).

The spelling of 3994005005 in words is "three billion, nine hundred ninety-four million, five thousand, five".