3871812 has 24 divisors (see below), whose sum is σ = 10325056. Its totient is φ = 1106208.

The previous prime is 3871811. The next prime is 3871817. The reversal of 3871812 is 2181783.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3871812.

It is not an unprimeable number, because it can be changed into a prime (3871811) 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, 22963 + ... + 23130.

Almost surely, 2^3871812 is an apocalyptic number.

It is an amenable number.

3871812 is an abundant number, since it is smaller than the sum of its proper divisors (6453244).

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

3871812 is a wasteful number, since it uses less digits than its factorization.

3871812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46107 (or 46105 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 3871812 is about 1967.6920490768. The cubic root of 3871812 is about 157.0259467306.

The spelling of 3871812 in words is "three million, eight hundred seventy-one thousand, eight hundred twelve".