6409445 has 12 divisors (see below), whose sum is σ = 8947404. Its totient is φ = 4394880.

The previous prime is 6409409. The next prime is 6409471. The reversal of 6409445 is 5449046.

It is a happy number.

6409445 is digitally balanced in base 3, 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 1940449 + 4468996 = 1393^2 + 2114^2 .

It is not a de Polignac number, because 6409445 - 2⁸ = 6409189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12836 + ... + 13325.

It is an arithmetic number, because the mean of its divisors is an integer number (745617).

Almost surely, 2^6409445 is an apocalyptic number.

It is an amenable number.

6409445 is a deficient number, since it is larger than the sum of its proper divisors (2537959).

6409445 is a wasteful number, since it uses less digits than its factorization.

6409445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26180 (or 26173 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6409445 is about 2531.6881719517. The cubic root of 6409445 is about 185.7548413824.

The spelling of 6409445 in words is "six million, four hundred nine thousand, four hundred forty-five".