2856285 has 12 divisors (see below), whose sum is σ = 4950972. Its totient is φ = 1523328.

The previous prime is 2856283. The next prime is 2856349. The reversal of 2856285 is 5826582.

2856285 is a `hidden beast` number, since 28 + 5 + 628 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 842724 + 2013561 = 918^2 + 1419^2 .

It is not a de Polignac number, because 2856285 - 2¹ = 2856283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856283) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 31692 + ... + 31781.

It is an arithmetic number, because the mean of its divisors is an integer number (412581).

2^2856285 is an apocalyptic number.

It is an amenable number.

2856285 is a deficient number, since it is larger than the sum of its proper divisors (2094687).

2856285 is a wasteful number, since it uses less digits than its factorization.

2856285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63484 (or 63481 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 2856285 is about 1690.0547328415. The cubic root of 2856285 is about 141.8841381165.

The spelling of 2856285 in words is "two million, eight hundred fifty-six thousand, two hundred eighty-five".