6428378 has 16 divisors (see below), whose sum is σ = 10744704. Its totient is φ = 2859360.

The previous prime is 6428369. The next prime is 6428393. The reversal of 6428378 is 8738246.

It is a d-powerful number, because it can be written as 6² + 4 + 2¹⁷ + 8³ + 3¹² + 7⁸ + 8³ .

It is a Curzon number.

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, 2075 + ... + 4142.

It is an arithmetic number, because the mean of its divisors is an integer number (671544).

Almost surely, 2^6428378 is an apocalyptic number.

6428378 is a deficient number, since it is larger than the sum of its proper divisors (4316326).

6428378 is a wasteful number, since it uses less digits than its factorization.

6428378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277.

The product of its digits is 64512, while the sum is 38.

The square root of 6428378 is about 2535.4246192699. The cubic root of 6428378 is about 185.9375633500.

The spelling of 6428378 in words is "six million, four hundred twenty-eight thousand, three hundred seventy-eight".