3984405 has 16 divisors (see below), whose sum is σ = 6652800. Its totient is φ = 2032448.

The previous prime is 3984403. The next prime is 3984439. The reversal of 3984405 is 5044893.

3984405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3984405 - 2¹ = 3984403 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984403) 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, 5430 + ... + 6119.

It is an arithmetic number, because the mean of its divisors is an integer number (415800).

Almost surely, 2^3984405 is an apocalyptic number.

It is an amenable number.

3984405 is a deficient number, since it is larger than the sum of its proper divisors (2668395).

3984405 is a wasteful number, since it uses less digits than its factorization.

3984405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11580.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 3984405 is about 1996.0974425113. The cubic root of 3984405 is about 158.5335405207.

The spelling of 3984405 in words is "three million, nine hundred eighty-four thousand, four hundred five".