3947473218 has 16 divisors (see below), whose sum is σ = 8502250176. Its totient is φ = 1214607120.

The previous prime is 3947473199. The next prime is 3947473261. The reversal of 3947473218 is 8123747493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25304238 + ... + 25304393.

It is an arithmetic number, because the mean of its divisors is an integer number (531390636).

Almost surely, 2^3947473218 is an apocalyptic number.

3947473218 is an abundant number, since it is smaller than the sum of its proper divisors (4554776958).

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

3947473218 is a wasteful number, since it uses less digits than its factorization.

3947473218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50608649.

The product of its digits is 1016064, while the sum is 48.

The square root of 3947473218 is about 62828.9202358277. The cubic root of 3947473218 is about 1580.4219908459.

The spelling of 3947473218 in words is "three billion, nine hundred forty-seven million, four hundred seventy-three thousand, two hundred eighteen".