3960405 has 48 divisors (see below), whose sum is σ = 7547904. Its totient is φ = 1912320.

The previous prime is 3960403. The next prime is 3960419. The reversal of 3960405 is 5040693.

It is a happy number.

It is not a de Polignac number, because 3960405 - 2¹ = 3960403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3960401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23632 + ... + 23798.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

Almost surely, 2^3960405 is an apocalyptic number.

It is an amenable number.

3960405 is a deficient number, since it is larger than the sum of its proper divisors (3587499).

3960405 is a wasteful number, since it uses less digits than its factorization.

3960405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 3960405 is about 1990.0766316903. The cubic root of 3960405 is about 158.2145911808.

The spelling of 3960405 in words is "three million, nine hundred sixty thousand, four hundred five".