3945187918 has 8 divisors (see below), whose sum is σ = 6763179312. Its totient is φ = 1690794816.

The previous prime is 3945187901. The next prime is 3945187957. The reversal of 3945187918 is 8197815493.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 140899555 + ... + 140899582.

It is an arithmetic number, because the mean of its divisors is an integer number (845397414).

Almost surely, 2^3945187918 is an apocalyptic number.

3945187918 is a deficient number, since it is larger than the sum of its proper divisors (2817991394).

3945187918 is a wasteful number, since it uses less digits than its factorization.

3945187918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281799146.

The product of its digits is 2177280, while the sum is 55.

The square root of 3945187918 is about 62810.7309143907. The cubic root of 3945187918 is about 1580.1169488289.

The spelling of 3945187918 in words is "three billion, nine hundred forty-five million, one hundred eighty-seven thousand, nine hundred eighteen".