3918919906 has 16 divisors (see below), whose sum is σ = 6691595328. Its totient is φ = 1703878000.

The previous prime is 3918919903. The next prime is 3918919913. The reversal of 3918919906 is 6099198193.

It is not an unprimeable number, because it can be changed into a prime (3918919903) 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, 3871945 + ... + 3872956.

It is an arithmetic number, because the mean of its divisors is an integer number (418224708).

Almost surely, 2^3918919906 is an apocalyptic number.

3918919906 is a deficient number, since it is larger than the sum of its proper divisors (2772675422).

3918919906 is a wasteful number, since it uses less digits than its factorization.

3918919906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744937.

The product of its (nonzero) digits is 944784, while the sum is 55.

The square root of 3918919906 is about 62601.2771914439. The cubic root of 3918919906 is about 1576.6022034163.

It can be divided in two parts, 39189 and 19906, that added together give a palindrome (59095).

The spelling of 3918919906 in words is "three billion, nine hundred eighteen million, nine hundred nineteen thousand, nine hundred six".