6428578 has 16 divisors (see below), whose sum is σ = 10495800. Its totient is φ = 2935296.

The previous prime is 6428573. The next prime is 6428623. The reversal of 6428578 is 8758246.

It can be written as a sum of positive squares in 4 ways, for example, as 5631129 + 797449 = 2373^2 + 893^2 .

It is a d-powerful number, because it can be written as 6⁵ + 4² + 2¹⁷ + 8⁶ + 5⁴ + 7⁸ + 8⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 6428578.

It is not an unprimeable number, because it can be changed into a prime (6428573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248 + ... + 3796.

Almost surely, 2^6428578 is an apocalyptic number.

6428578 is a deficient number, since it is larger than the sum of its proper divisors (4067222).

6428578 is a wasteful number, since it uses less digits than its factorization.

6428578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661.

The product of its digits is 107520, while the sum is 40.

The square root of 6428578 is about 2535.4640600884. The cubic root of 6428578 is about 185.9394916294.

The spelling of 6428578 in words is "six million, four hundred twenty-eight thousand, five hundred seventy-eight".