3871138 has 16 divisors (see below), whose sum is σ = 6300504. Its totient is φ = 1776640.

The previous prime is 3871129. The next prime is 3871139. The reversal of 3871138 is 8311783.

It can be written as a sum of positive squares in 4 ways, for example, as 2199289 + 1671849 = 1483^2 + 1293^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3871139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6 + ... + 2782.

Almost surely, 2^3871138 is an apocalyptic number.

3871138 is a deficient number, since it is larger than the sum of its proper divisors (2429366).

3871138 is a wasteful number, since it uses less digits than its factorization.

3871138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its digits is 4032, while the sum is 31.

The square root of 3871138 is about 1967.5207749856. The cubic root of 3871138 is about 157.0168345776.

The spelling of 3871138 in words is "three million, eight hundred seventy-one thousand, one hundred thirty-eight".