2856831285 has 64 divisors (see below), whose sum is σ = 5708206080. Its totient is φ = 1185300480.

The previous prime is 2856831233. The next prime is 2856831301. The reversal of 2856831285 is 5821386582.

2856831285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2856831285 - 2¹⁸ = 2856569141 is a prime.

It is a super-2 number, since 2×2856831285² = 16322969981909502450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 856501 + ... + 859829.

It is an arithmetic number, because the mean of its divisors is an integer number (89190720).

Almost surely, 2^2856831285 is an apocalyptic number.

It is an amenable number.

2856831285 is a deficient number, since it is larger than the sum of its proper divisors (2851374795).

2856831285 is a wasteful number, since it uses less digits than its factorization.

2856831285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its digits is 921600, while the sum is 48.

The square root of 2856831285 is about 53449.3338124995. Note that the first 3 decimals coincide. The cubic root of 2856831285 is about 1418.9318299301.

The spelling of 2856831285 in words is "two billion, eight hundred fifty-six million, eight hundred thirty-one thousand, two hundred eighty-five".