7218834 has 16 divisors (see below), whose sum is σ = 16500288. Its totient is φ = 2062512.

The previous prime is 7218821. The next prime is 7218839. The reversal of 7218834 is 4388127.

It is a super-2 number, since 2×7218834² = 104223128639112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7218795 and 7218804.

It is not an unprimeable number, because it can be changed into a prime (7218839) 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, 85897 + ... + 85980.

It is an arithmetic number, because the mean of its divisors is an integer number (1031268).

Almost surely, 2^7218834 is an apocalyptic number.

7218834 is an abundant number, since it is smaller than the sum of its proper divisors (9281454).

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

7218834 is a wasteful number, since it uses less digits than its factorization.

7218834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171889.

The product of its digits is 10752, while the sum is 33.

The square root of 7218834 is about 2686.7887896148. The cubic root of 7218834 is about 193.2661009453.

The spelling of 7218834 in words is "seven million, two hundred eighteen thousand, eight hundred thirty-four".