3965681396 has 12 divisors (see below), whose sum is σ = 6975902052. Its totient is φ = 1972566528.

The previous prime is 3965681389. The next prime is 3965681399. The reversal of 3965681396 is 6931865693.

It can be written as a sum of positive squares in 2 ways, for example, as 1917213796 + 2048467600 = 43786^2 + 45260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965681399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567675 + ... + 2569218.

It is an arithmetic number, because the mean of its divisors is an integer number (581325171).

Almost surely, 2^3965681396 is an apocalyptic number.

It is an amenable number.

3965681396 is a deficient number, since it is larger than the sum of its proper divisors (3010220656).

3965681396 is a wasteful number, since it uses less digits than its factorization.

3965681396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137090 (or 5137088 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 56.

The square root of 3965681396 is about 62973.6563651818. The cubic root of 3965681396 is about 1582.8482241373.

The spelling of 3965681396 in words is "three billion, nine hundred sixty-five million, six hundred eighty-one thousand, three hundred ninety-six".