4218839 has 4 divisors (see below), whose sum is σ = 4467024. Its totient is φ = 3970656.

The previous prime is 4218829. The next prime is 4218847. The reversal of 4218839 is 9388124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4218839 - 2⁸ = 4218583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4218799 and 4218808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4218829) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 124067 + ... + 124100.

It is an arithmetic number, because the mean of its divisors is an integer number (1116756).

Almost surely, 2^4218839 is an apocalyptic number.

4218839 is a deficient number, since it is larger than the sum of its proper divisors (248185).

4218839 is a wasteful number, since it uses less digits than its factorization.

4218839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248184.

The product of its digits is 13824, while the sum is 35.

The square root of 4218839 is about 2053.9812560002. The cubic root of 4218839 is about 161.5837380092.

It can be divided in two parts, 42 and 18839, that added together give a palindrome (18881).

The spelling of 4218839 in words is "four million, two hundred eighteen thousand, eight hundred thirty-nine".