2216784 has 20 divisors (see below), whose sum is σ = 5726816. Its totient is φ = 738912.

The previous prime is 2216777. The next prime is 2216803. The reversal of 2216784 is 4876122.

It is a congruent number.

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, 23044 + ... + 23139.

2^2216784 is an apocalyptic number.

2216784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2216784 is an abundant number, since it is smaller than the sum of its proper divisors (3510032).

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

2216784 is a wasteful number, since it uses less digits than its factorization.

2216784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46194 (or 46188 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 2216784 is about 1488.8868325027. The cubic root of 2216784 is about 130.3890514852.

The spelling of 2216784 in words is "two million, two hundred sixteen thousand, seven hundred eighty-four".