2857145873 has 4 divisors (see below), whose sum is σ = 2885434548. Its totient is φ = 2828857200.

The previous prime is 2857145869. The next prime is 2857145897. The reversal of 2857145873 is 3785417582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2647822849 + 209323024 = 51457^2 + 14468^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857145873 - 2² = 2857145869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2857145833) 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 3 ways as a sum of consecutive naturals, for example, 14144186 + ... + 14144387.

It is an arithmetic number, because the mean of its divisors is an integer number (721358637).

Almost surely, 2^2857145873 is an apocalyptic number.

It is an amenable number.

2857145873 is a deficient number, since it is larger than the sum of its proper divisors (28288675).

2857145873 is a wasteful number, since it uses less digits than its factorization.

2857145873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28288674.

The product of its digits is 1881600, while the sum is 50.

The square root of 2857145873 is about 53452.2765932378. The cubic root of 2857145873 is about 1418.9839112395.

The spelling of 2857145873 in words is "two billion, eight hundred fifty-seven million, one hundred forty-five thousand, eight hundred seventy-three".