3947278108 has 6 divisors (see below), whose sum is σ = 6907736696. Its totient is φ = 1973639052.

The previous prime is 3947278103. The next prime is 3947278151. The reversal of 3947278108 is 8018727493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947278103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493409760 + ... + 493409767.

Almost surely, 2^3947278108 is an apocalyptic number.

It is an amenable number.

3947278108 is a deficient number, since it is larger than the sum of its proper divisors (2960458588).

3947278108 is a wasteful number, since it uses less digits than its factorization.

3947278108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986819531 (or 986819529 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 3947278108 is about 62827.3675081170. The cubic root of 3947278108 is about 1580.3959521457.

The spelling of 3947278108 in words is "three billion, nine hundred forty-seven million, two hundred seventy-eight thousand, one hundred eight".