6378478 has 4 divisors (see below), whose sum is σ = 9567720. Its totient is φ = 3189238.

The previous prime is 6378409. The next prime is 6378487. The reversal of 6378478 is 8748736.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594618 + ... + 1594621.

It is an arithmetic number, because the mean of its divisors is an integer number (2391930).

Almost surely, 2^6378478 is an apocalyptic number.

6378478 is a deficient number, since it is larger than the sum of its proper divisors (3189242).

6378478 is a wasteful number, since it uses less digits than its factorization.

6378478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189241.

The product of its digits is 225792, while the sum is 43.

The square root of 6378478 is about 2525.5648873074. The cubic root of 6378478 is about 185.4552023820.

The spelling of 6378478 in words is "six million, three hundred seventy-eight thousand, four hundred seventy-eight".