6404416 has 14 divisors (see below), whose sum is σ = 12708890. Its totient is φ = 3202176.

The previous prime is 6404407. The next prime is 6404449. The reversal of 6404416 is 6144046.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 254016 = 2480^2 + 504^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49971 + ... + 50098.

Almost surely, 2^6404416 is an apocalyptic number.

It is an amenable number.

6404416 is a deficient number, since it is larger than the sum of its proper divisors (6304474).

6404416 is a wasteful number, since it uses less digits than its factorization.

6404416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100081 (or 100071 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 6404416 is about 2530.6947662648. The cubic root of 6404416 is about 185.7062461439.

The spelling of 6404416 in words is "six million, four hundred four thousand, four hundred sixteen".