4218689 has 8 divisors (see below), whose sum is σ = 4315680. Its totient is φ = 4122976.

The previous prime is 4218671. The next prime is 4218701. The reversal of 4218689 is 9868124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4218689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4218289) 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, 9302 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (539460).

Almost surely, 2^4218689 is an apocalyptic number.

It is an amenable number.

4218689 is a deficient number, since it is larger than the sum of its proper divisors (96991).

4218689 is a wasteful number, since it uses less digits than its factorization.

4218689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its digits is 27648, while the sum is 38.

The square root of 4218689 is about 2053.9447412236. The cubic root of 4218689 is about 161.5818229604.

The spelling of 4218689 in words is "four million, two hundred eighteen thousand, six hundred eighty-nine".