2856445220 has 12 divisors (see below), whose sum is σ = 5998535004. Its totient is φ = 1142578080.

The previous prime is 2856445217. The next prime is 2856445259. The reversal of 2856445220 is 225446582.

It can be written as a sum of positive squares in 2 ways, for example, as 2019963136 + 836482084 = 44944^2 + 28922^2 .

It is an unprimeable number.

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, 71411111 + ... + 71411150.

It is an arithmetic number, because the mean of its divisors is an integer number (499877917).

Almost surely, 2^2856445220 is an apocalyptic number.

2856445220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2856445220 is an abundant number, since it is smaller than the sum of its proper divisors (3142089784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2856445220 is a wasteful number, since it uses less digits than its factorization.

2856445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142822270 (or 142822268 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 38.

The square root of 2856445220 is about 53445.7221861582. The cubic root of 2856445220 is about 1418.8679100902.

The spelling of 2856445220 in words is "two billion, eight hundred fifty-six million, four hundred forty-five thousand, two hundred twenty".