6404404 has 24 divisors (see below), whose sum is σ = 11645480. Its totient is φ = 3079296.

The previous prime is 6404401. The next prime is 6404407. The reversal of 6404404 is 4044046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6404401) and next prime (6404407).

It can be written as a sum of positive squares in 4 ways, for example, as 3348900 + 3055504 = 1830^2 + 1748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404401) 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 7 ways as a sum of consecutive naturals, for example, 15934 + ... + 16330.

Almost surely, 2^6404404 is an apocalyptic number.

It is an amenable number.

6404404 is a deficient number, since it is larger than the sum of its proper divisors (5241076).

6404404 is a wasteful number, since it uses less digits than its factorization.

6404404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 6404404 is about 2530.6923953733. The cubic root of 6404404 is about 185.7061301575.

The spelling of 6404404 in words is "six million, four hundred four thousand, four hundred four".