3871241638 has 16 divisors (see below), whose sum is σ = 6337460736. Its totient is φ = 1758904840.

The previous prime is 3871241623. The next prime is 3871241641. The reversal of 3871241638 is 8361421783.

It is a junction number, because it is equal to n+sod(n) for n = 3871241594 and 3871241603.

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, 16995 + ... + 89617.

It is an arithmetic number, because the mean of its divisors is an integer number (396091296).

Almost surely, 2^3871241638 is an apocalyptic number.

3871241638 is a deficient number, since it is larger than the sum of its proper divisors (2466219098).

3871241638 is a wasteful number, since it uses less digits than its factorization.

3871241638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75059.

The product of its digits is 193536, while the sum is 43.

The square root of 3871241638 is about 62219.3027765500. The cubic root of 3871241638 is about 1570.1823578192.

The spelling of 3871241638 in words is "three billion, eight hundred seventy-one million, two hundred forty-one thousand, six hundred thirty-eight".