2821837864 has 16 divisors (see below), whose sum is σ = 5345493300. Its totient is φ = 1396372992.

The previous prime is 2821837853. The next prime is 2821837883. The reversal of 2821837864 is 4687381282.

It can be written as a sum of positive squares in 2 ways, for example, as 2772022500 + 49815364 = 52650^2 + 7058^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1817419 + ... + 1818970.

Almost surely, 2^2821837864 is an apocalyptic number.

It is an amenable number.

2821837864 is a deficient number, since it is larger than the sum of its proper divisors (2523655436).

2821837864 is a wasteful number, since it uses less digits than its factorization.

2821837864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636492 (or 3636488 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 2821837864 is about 53120.9738615549. The cubic root of 2821837864 is about 1413.1144983262.

The spelling of 2821837864 in words is "two billion, eight hundred twenty-one million, eight hundred thirty-seven thousand, eight hundred sixty-four".