6400585 has 16 divisors (see below), whose sum is σ = 8192016. Its totient is φ = 4784128.

The previous prime is 6400543. The next prime is 6400591. The reversal of 6400585 is 5850046.

6400585 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 8 ways, for example, as 2547216 + 3853369 = 1596^2 + 1963^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400585 - 2¹¹ = 6398537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21699 + ... + 21991.

It is an arithmetic number, because the mean of its divisors is an integer number (512001).

Almost surely, 2^6400585 is an apocalyptic number.

It is an amenable number.

6400585 is a deficient number, since it is larger than the sum of its proper divisors (1791431).

6400585 is a wasteful number, since it uses less digits than its factorization.

6400585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 6400585 is about 2529.9377462697. The cubic root of 6400585 is about 185.6692101086.

The spelling of 6400585 in words is "six million, four hundred thousand, five hundred eighty-five".