3949065808 has 20 divisors (see below), whose sum is σ = 7657236468. Its totient is φ = 1973004800.

The previous prime is 3949065803. The next prime is 3949065823. The reversal of 3949065808 is 8085609493.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 224160784 + 3724905024 = 14972^2 + 61032^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949065803) 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, 74041 + ... + 115672.

Almost surely, 2^3949065808 is an apocalyptic number.

It is an amenable number.

3949065808 is a deficient number, since it is larger than the sum of its proper divisors (3708170660).

3949065808 is a wasteful number, since it uses less digits than its factorization.

3949065808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191022 (or 191016 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 3949065808 is about 62841.5929778996. The cubic root of 3949065808 is about 1580.6345002757.

The spelling of 3949065808 in words is "three billion, nine hundred forty-nine million, sixty-five thousand, eight hundred eight".