6409449 has 20 divisors (see below), whose sum is σ = 9761796. Its totient is φ = 4189536.

The previous prime is 6409409. The next prime is 6409471. The reversal of 6409449 is 9449046.

6409449 is a `hidden beast` number, since 640 + 9 + 4 + 4 + 9 = 666.

6409449 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5143824 + 1265625 = 2268^2 + 1125^2 .

It is not a de Polignac number, because 6409449 - 2⁷ = 6409321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6409409) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3547 + ... + 5039.

Almost surely, 2^6409449 is an apocalyptic number.

It is an amenable number.

6409449 is a deficient number, since it is larger than the sum of its proper divisors (3352347).

6409449 is a wasteful number, since it uses less digits than its factorization.

6409449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558 (or 1549 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6409449 is about 2531.6889619383. The cubic root of 6409449 is about 185.7548800243.

The spelling of 6409449 in words is "six million, four hundred nine thousand, four hundred forty-nine".