3961681908 has 96 divisors (see below), whose sum is σ = 9772371840. Its totient is φ = 1247477760.

The previous prime is 3961681907. The next prime is 3961681931. The reversal of 3961681908 is 8091861693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961681901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5151348 + ... + 5152116.

It is an arithmetic number, because the mean of its divisors is an integer number (101795540).

Almost surely, 2^3961681908 is an apocalyptic number.

It is an amenable number.

3961681908 is an abundant number, since it is smaller than the sum of its proper divisors (5810689932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3961681908 is a wasteful number, since it uses less digits than its factorization.

3961681908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 3961681908 is about 62941.8931078499. The cubic root of 3961681908 is about 1582.3159312624.

The spelling of 3961681908 in words is "three billion, nine hundred sixty-one million, six hundred eighty-one thousand, nine hundred eight".