2856375820 has 12 divisors (see below), whose sum is σ = 5998389264. Its totient is φ = 1142550320.

The previous prime is 2856375817. The next prime is 2856375829. The reversal of 2856375820 is 285736582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2856375829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71409376 + ... + 71409415.

It is an arithmetic number, because the mean of its divisors is an integer number (499865772).

Almost surely, 2^2856375820 is an apocalyptic number.

2856375820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2856375820 is an abundant number, since it is smaller than the sum of its proper divisors (3142013444).

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

2856375820 is a wasteful number, since it uses less digits than its factorization.

2856375820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142818800 (or 142818798 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 2856375820 is about 53445.0729253876. The cubic root of 2856375820 is about 1418.8564190908.

The spelling of 2856375820 in words is "two billion, eight hundred fifty-six million, three hundred seventy-five thousand, eight hundred twenty".