3871838 has 16 divisors (see below), whose sum is σ = 6044544. Its totient is φ = 1858080.

The previous prime is 3871831. The next prime is 3871841. The reversal of 3871838 is 8381783.

It is a super-2 number, since 2×3871838² = 29982258996488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871831) 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, 12056 + ... + 12372.

It is an arithmetic number, because the mean of its divisors is an integer number (377784).

Almost surely, 2^3871838 is an apocalyptic number.

3871838 is a deficient number, since it is larger than the sum of its proper divisors (2172706).

3871838 is a wasteful number, since it uses less digits than its factorization.

3871838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547.

The product of its digits is 32256, while the sum is 38.

The square root of 3871838 is about 1967.6986557906. The cubic root of 3871838 is about 157.0262982168.

The spelling of 3871838 in words is "three million, eight hundred seventy-one thousand, eight hundred thirty-eight".