2217438 has 12 divisors (see below), whose sum is σ = 4804488. Its totient is φ = 739140.

The previous prime is 2217421. The next prime is 2217443. The reversal of 2217438 is 8347122.

2217438 is a `hidden beast` number, since 221 + 7 + 438 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61578 + ... + 61613.

It is an arithmetic number, because the mean of its divisors is an integer number (400374).

2^2217438 is an apocalyptic number.

2217438 is an abundant number, since it is smaller than the sum of its proper divisors (2587050).

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

2217438 is a wasteful number, since it uses less digits than its factorization.

2217438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123199 (or 123196 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2217438 is about 1489.1064434754. The cubic root of 2217438 is about 130.4018727697.

The spelling of 2217438 in words is "two million, two hundred seventeen thousand, four hundred thirty-eight".