3640841 has 4 divisors (see below), whose sum is σ = 3729684. Its totient is φ = 3552000.

The previous prime is 3640829. The next prime is 3640843. The reversal of 3640841 is 1480463.

3640841 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 an emirpimes, since its reverse is a distinct semiprime: 1480463 = 241 ⋅6143.

It can be written as a sum of positive squares in 2 ways, for example, as 87616 + 3553225 = 296^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640841 - 2¹⁰ = 3639817 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 3640841.

It is not an unprimeable number, because it can be changed into a prime (3640843) 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, 44360 + ... + 44441.

It is an arithmetic number, because the mean of its divisors is an integer number (932421).

Almost surely, 2^3640841 is an apocalyptic number.

It is an amenable number.

3640841 is a deficient number, since it is larger than the sum of its proper divisors (88843).

3640841 is an equidigital number, since it uses as much as digits as its factorization.

3640841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88842.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 3640841 is about 1908.0987919917. The cubic root of 3640841 is about 153.8392796736.

The spelling of 3640841 in words is "three million, six hundred forty thousand, eight hundred forty-one".