3811863 has 12 divisors (see below), whose sum is σ = 5587064. Its totient is φ = 2310000.

The previous prime is 3811817. The next prime is 3811877. The reversal of 3811863 is 3681183.

3811863 = T₈₂₇ + T₈₂₈ + ... + T₈₃₇.

3811863 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 3811863 - 2¹⁷ = 3680791 is a prime.

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 3811863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3811063) 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 11 ways as a sum of consecutive naturals, for example, 4888 + ... + 5613.

Almost surely, 2^3811863 is an apocalyptic number.

3811863 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3811863 is a deficient number, since it is larger than the sum of its proper divisors (1775201).

3811863 is a wasteful number, since it uses less digits than its factorization.

3811863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10526 (or 10515 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 3811863 is about 1952.3992931775. The cubic root of 3811863 is about 156.2112932389.

The spelling of 3811863 in words is "three million, eight hundred eleven thousand, eight hundred sixty-three".