6404168 has 8 divisors (see below), whose sum is σ = 12007830. Its totient is φ = 3202080.

The previous prime is 6404161. The next prime is 6404171. The reversal of 6404168 is 8614046.

It can be written as a sum of positive squares in only one way, i.e., 6041764 + 362404 = 2458^2 + 602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6404168.

It is not an unprimeable number, because it can be changed into a prime (6404161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400253 + ... + 400268.

Almost surely, 2^6404168 is an apocalyptic number.

It is an amenable number.

6404168 is a deficient number, since it is larger than the sum of its proper divisors (5603662).

6404168 is a wasteful number, since it uses less digits than its factorization.

6404168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800527 (or 800523 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 6404168 is about 2530.6457673882. The cubic root of 6404168 is about 185.7038490613.

The spelling of 6404168 in words is "six million, four hundred four thousand, one hundred sixty-eight".