3811641 has 4 divisors (see below), whose sum is σ = 5082192. Its totient is φ = 2541092.

The previous prime is 3811631. The next prime is 3811657. The reversal of 3811641 is 1461183.

3811641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3811641 - 2¹¹ = 3809593 is a prime.

It is a super-2 number, since 2×3811641² = 29057214225762, which contains 22 as substring.

It is a D-number.

3811641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3811631) 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 3 ways as a sum of consecutive naturals, for example, 635271 + ... + 635276.

It is an arithmetic number, because the mean of its divisors is an integer number (1270548).

Almost surely, 2^3811641 is an apocalyptic number.

It is an amenable number.

3811641 is a deficient number, since it is larger than the sum of its proper divisors (1270551).

3811641 is a wasteful number, since it uses less digits than its factorization.

3811641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270550.

The product of its digits is 576, while the sum is 24.

The square root of 3811641 is about 1952.3424392253. The cubic root of 3811641 is about 156.2082606377.

The spelling of 3811641 in words is "three million, eight hundred eleven thousand, six hundred forty-one".