2783821216 has 48 divisors (see below), whose sum is σ = 5997202848. Its totient is φ = 1261497600.

The previous prime is 2783821211. The next prime is 2783821223. The reversal of 2783821216 is 6121283872.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2783821211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104566 + ... + 128458.

It is an arithmetic number, because the mean of its divisors is an integer number (124941726).

Almost surely, 2^2783821216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2783821216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2998601424).

2783821216 is an abundant number, since it is smaller than the sum of its proper divisors (3213381632).

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

2783821216 is a wasteful number, since it uses less digits than its factorization.

2783821216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24245 (or 24237 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 2783821216 is about 52761.9296083834. The cubic root of 2783821216 is about 1406.7398170545.

The spelling of 2783821216 in words is "two billion, seven hundred eighty-three million, eight hundred twenty-one thousand, two hundred sixteen".