3811885 has 16 divisors (see below), whose sum is σ = 5703552. Its totient is φ = 2376000.

The previous prime is 3811877. The next prime is 3811889. The reversal of 3811885 is 5881183.

3811885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3811885 - 2³ = 3811877 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3811885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4566 + ... + 5335.

It is an arithmetic number, because the mean of its divisors is an integer number (356472).

Almost surely, 2^3811885 is an apocalyptic number.

3811885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3811885 is a deficient number, since it is larger than the sum of its proper divisors (1891667).

3811885 is a wasteful number, since it uses less digits than its factorization.

3811885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924.

The product of its digits is 7680, while the sum is 34.

The square root of 3811885 is about 1952.4049272628. The cubic root of 3811885 is about 156.2115937605.

The spelling of 3811885 in words is "three million, eight hundred eleven thousand, eight hundred eighty-five".