3871431380 has 18 divisors (see below), whose sum is σ = 8130590286. Its totient is φ = 1548461248.

The previous prime is 3871431359. The next prime is 3871431409. The reversal of 3871431380 is 831341783.

3871431380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 790959376 + 3080472004 = 28124^2 + 55502^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271304 + ... + 285216.

Almost surely, 2^3871431380 is an apocalyptic number.

It is an amenable number.

3871431380 is an abundant number, since it is smaller than the sum of its proper divisors (4259158906).

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

3871431380 is an frugal number, since it uses more digits than its factorization.

3871431380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27835 (or 13920 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 3871431380 is about 62220.8275419091. The cubic root of 3871431380 is about 1570.2080106288.

The spelling of 3871431380 in words is "three billion, eight hundred seventy-one million, four hundred thirty-one thousand, three hundred eighty".