6478385 has 8 divisors (see below), whose sum is σ = 7881000. Its totient is φ = 5111424.

The previous prime is 6478379. The next prime is 6478421. The reversal of 6478385 is 5838746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47089 + 6431296 = 217^2 + 2536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6478385 is a prime.

It is an unprimeable number.

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, 8510 + ... + 9239.

It is an arithmetic number, because the mean of its divisors is an integer number (985125).

Almost surely, 2^6478385 is an apocalyptic number.

It is an amenable number.

6478385 is a deficient number, since it is larger than the sum of its proper divisors (1402615).

6478385 is a wasteful number, since it uses less digits than its factorization.

6478385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17827.

The product of its digits is 161280, while the sum is 41.

The square root of 6478385 is about 2545.2671765455. The cubic root of 6478385 is about 186.4184608589.

The spelling of 6478385 in words is "six million, four hundred seventy-eight thousand, three hundred eighty-five".