2217828 has 24 divisors (see below), whose sum is σ = 5199040. Its totient is φ = 735840.

The previous prime is 2217799. The next prime is 2217829. The reversal of 2217828 is 8287122.

It is a happy number.

2217828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2217828² = 9837522075168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2217795 and 2217804.

It is not an unprimeable number, because it can be changed into a prime (2217829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4833 + ... + 5271.

2^2217828 is an apocalyptic number.

It is an amenable number.

2217828 is an abundant number, since it is smaller than the sum of its proper divisors (2981212).

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

2217828 is a wasteful number, since it uses less digits than its factorization.

2217828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 865 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 2217828 is about 1489.2373887329. The cubic root of 2217828 is about 130.4095172900.

The spelling of 2217828 in words is "two million, two hundred seventeen thousand, eight hundred twenty-eight".