3947336680 has 64 divisors (see below), whose sum is σ = 10156078080. Its totient is φ = 1352601600.

The previous prime is 3947336677. The next prime is 3947336681. The reversal of 3947336680 is 866337493.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3947336681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722760 + ... + 728200.

It is an arithmetic number, because the mean of its divisors is an integer number (158688720).

Almost surely, 2^3947336680 is an apocalyptic number.

3947336680 is the 36274-th octagonal number.

It is an amenable number.

3947336680 is an abundant number, since it is smaller than the sum of its proper divisors (6208741400).

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

3947336680 is a wasteful number, since it uses less digits than its factorization.

3947336680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050 (or 8046 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

The square root of 3947336680 is about 62827.8336408315. The cubic root of 3947336680 is about 1580.4037690507.

The spelling of 3947336680 in words is "three billion, nine hundred forty-seven million, three hundred thirty-six thousand, six hundred eighty".