3871720220 has 24 divisors (see below), whose sum is σ = 8132967024. Its totient is φ = 1548239616.

The previous prime is 3871720217. The next prime is 3871720261. The reversal of 3871720220 is 220271783.

3871720220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 47759 + ... + 100121.

It is an arithmetic number, because the mean of its divisors is an integer number (338873626).

Almost surely, 2^3871720220 is an apocalyptic number.

It is an amenable number.

3871720220 is an abundant number, since it is smaller than the sum of its proper divisors (4261246804).

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

3871720220 is a wasteful number, since it uses less digits than its factorization.

3871720220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56069 (or 56067 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 3871720220 is about 62223.1485863581. The cubic root of 3871720220 is about 1570.2470597176.

The spelling of 3871720220 in words is "three billion, eight hundred seventy-one million, seven hundred twenty thousand, two hundred twenty".