3947848648 has 16 divisors (see below), whose sum is σ = 7657465500. Its totient is φ = 1905857856.

The previous prime is 3947848637. The next prime is 3947848649. The reversal of 3947848648 is 8468487493.

It can be written as a sum of positive squares in 2 ways, for example, as 3730522084 + 217326564 = 61078^2 + 14742^2 .

It is not an unprimeable number, because it can be changed into a prime (3947848649) 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, 8508063 + ... + 8508526.

Almost surely, 2^3947848648 is an apocalyptic number.

It is an amenable number.

3947848648 is a deficient number, since it is larger than the sum of its proper divisors (3709616852).

3947848648 is a wasteful number, since it uses less digits than its factorization.

3947848648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17016624 (or 17016620 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 61.

The square root of 3947848648 is about 62831.9078812668. The cubic root of 3947848648 is about 1580.4720920107.

The spelling of 3947848648 in words is "three billion, nine hundred forty-seven million, eight hundred forty-eight thousand, six hundred forty-eight".