3944905 has 12 divisors (see below), whose sum is σ = 4897476. Its totient is φ = 3050400.

The previous prime is 3944881. The next prime is 3944909. The reversal of 3944905 is 5094493.

3944905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1245456 + 2699449 = 1116^2 + 1643^2 .

It is not a de Polignac number, because 3944905 - 2⁵ = 3944873 is a prime.

It is a Duffinian number.

3944905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3944909) 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, 4395 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (408123).

Almost surely, 2^3944905 is an apocalyptic number.

It is an amenable number.

3944905 is a deficient number, since it is larger than the sum of its proper divisors (952571).

3944905 is an equidigital number, since it uses as much as digits as its factorization.

3944905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 3944905 is about 1986.1784914755. The cubic root of 3944905 is about 158.0079176719.

It can be divided in two parts, 39 and 44905, that added together give a palindrome (44944).

The spelling of 3944905 in words is "three million, nine hundred forty-four thousand, nine hundred five".