6405964 has 24 divisors (see below), whose sum is σ = 12185600. Its totient is φ = 2935440.

The previous prime is 6405943. The next prime is 6405979. The reversal of 6405964 is 4695046.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 997 + ... + 3715.

Almost surely, 2^6405964 is an apocalyptic number.

It is an amenable number.

6405964 is a deficient number, since it is larger than the sum of its proper divisors (5779636).

6405964 is a wasteful number, since it uses less digits than its factorization.

6405964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773 (or 2771 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6405964 is about 2531.0005926511. Note that the first 3 decimals coincide. The cubic root of 6405964 is about 185.7212071808.

The spelling of 6405964 in words is "six million, four hundred five thousand, nine hundred sixty-four".