2217904 has 20 divisors (see below), whose sum is σ = 4628176. Its totient is φ = 1023552.

The previous prime is 2217881. The next prime is 2217907. The reversal of 2217904 is 4097122.

2217904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2217907) 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 3 ways as a sum of consecutive naturals, for example, 5124 + ... + 5539.

2^2217904 is an apocalyptic number.

It is an amenable number.

2217904 is an abundant number, since it is smaller than the sum of its proper divisors (2410272).

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

2217904 is a wasteful number, since it uses less digits than its factorization.

2217904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684 (or 10678 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2217904 is about 1489.2629049298. The cubic root of 2217904 is about 130.4110068870.

The spelling of 2217904 in words is "two million, two hundred seventeen thousand, nine hundred four".