2857019985 has 64 divisors (see below), whose sum is σ = 5256437760. Its totient is φ = 1470813120.

The previous prime is 2857019981. The next prime is 2857020013. The reversal of 2857019985 is 5899107582.

It is not a de Polignac number, because 2857019985 - 2² = 2857019981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2857019981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2456014 + ... + 2457176.

It is an arithmetic number, because the mean of its divisors is an integer number (82131840).

Almost surely, 2^2857019985 is an apocalyptic number.

It is an amenable number.

2857019985 is a deficient number, since it is larger than the sum of its proper divisors (2399417775).

2857019985 is a wasteful number, since it uses less digits than its factorization.

2857019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 2857019985 is about 53451.0990064751. The cubic root of 2857019985 is about 1418.9630704333.

The spelling of 2857019985 in words is "two billion, eight hundred fifty-seven million, nineteen thousand, nine hundred eighty-five".