2821206836 has 24 divisors (see below), whose sum is σ = 5671659840. Its totient is φ = 1202821632.

The previous prime is 2821206809. The next prime is 2821206847. The reversal of 2821206836 is 6386021282.

It is a super-2 number, since 2×2821206836² = 15918416022986261792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2821206836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255626 + ... + 266433.

It is an arithmetic number, because the mean of its divisors is an integer number (236319160).

Almost surely, 2^2821206836 is an apocalyptic number.

It is an amenable number.

2821206836 is an abundant number, since it is smaller than the sum of its proper divisors (2850453004).

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

2821206836 is a wasteful number, since it uses less digits than its factorization.

2821206836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522263 (or 522261 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 2821206836 is about 53115.0339922700. The cubic root of 2821206836 is about 1413.0091554803.

The spelling of 2821206836 in words is "two billion, eight hundred twenty-one million, two hundred six thousand, eight hundred thirty-six".