2821380816 has 40 divisors (see below), whose sum is σ = 7329307680. Its totient is φ = 935203456.

The previous prime is 2821380769. The next prime is 2821380827. The reversal of 2821380816 is 6180831282.

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, 155595 + ... + 172778.

It is an arithmetic number, because the mean of its divisors is an integer number (183232692).

Almost surely, 2^2821380816 is an apocalyptic number.

It is an amenable number.

2821380816 is an abundant number, since it is smaller than the sum of its proper divisors (4507926864).

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

2821380816 is a wasteful number, since it uses less digits than its factorization.

2821380816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328563 (or 328557 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 2821380816 is about 53116.6717330821. The cubic root of 2821380816 is about 1413.0382010028.

The spelling of 2821380816 in words is "two billion, eight hundred twenty-one million, three hundred eighty thousand, eight hundred sixteen".