6404144 has 20 divisors (see below), whose sum is σ = 12580296. Its totient is φ = 3157632.

The previous prime is 6404141. The next prime is 6404161. The reversal of 6404144 is 4414046.

It is not an unprimeable number, because it can be changed into a prime (6404141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574 + ... + 3909.

Almost surely, 2^6404144 is an apocalyptic number.

It is an amenable number.

6404144 is a deficient number, since it is larger than the sum of its proper divisors (6176152).

6404144 is a wasteful number, since it uses less digits than its factorization.

6404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5564 (or 5558 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 6404144 is about 2530.6410255111. The cubic root of 6404144 is about 185.7036170823.

The spelling of 6404144 in words is "six million, four hundred four thousand, one hundred forty-four".