2216394880 has 64 divisors (see below), whose sum is σ = 6055519680. Its totient is φ = 759905280.

The previous prime is 2216394871. The next prime is 2216394883. The reversal of 2216394880 is 884936122.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (2216394883) 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, 242886 + ... + 251845.

It is an arithmetic number, because the mean of its divisors is an integer number (94617495).

Almost surely, 2^2216394880 is an apocalyptic number.

2216394880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2216394880 is an abundant number, since it is smaller than the sum of its proper divisors (3839124800).

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

2216394880 is an equidigital number, since it uses as much as digits as its factorization.

2216394880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494757 (or 494745 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 2216394880 is about 47078.6032078268. The cubic root of 2216394880 is about 1303.8142182039.

The spelling of 2216394880 in words is "two billion, two hundred sixteen million, three hundred ninety-four thousand, eight hundred eighty".