7018218 has 16 divisors (see below), whose sum is σ = 15596160. Its totient is φ = 2339388.

The previous prime is 7018213. The next prime is 7018259. The reversal of 7018218 is 8128107.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7018191 and 7018200.

It is not an unprimeable number, because it can be changed into a prime (7018213) 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 7 ways as a sum of consecutive naturals, for example, 64930 + ... + 65037.

It is an arithmetic number, because the mean of its divisors is an integer number (974760).

Almost surely, 2^7018218 is an apocalyptic number.

7018218 is an abundant number, since it is smaller than the sum of its proper divisors (8577942).

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

7018218 is a wasteful number, since it uses less digits than its factorization.

7018218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129978 (or 129972 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 7018218 is about 2649.1919522753. The cubic root of 7018218 is about 191.4589258530.

The spelling of 7018218 in words is "seven million, eighteen thousand, two hundred eighteen".