7045218 has 40 divisors (see below), whose sum is σ = 15944412. Its totient is φ = 2325024.

The previous prime is 7045193. The next prime is 7045223. The reversal of 7045218 is 8125407.

It can be written as a sum of positive squares in 2 ways, for example, as 6487209 + 558009 = 2547^2 + 747^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 7045191 and 7045200.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25296 + ... + 25572.

Almost surely, 2^7045218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7045218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7972206).

7045218 is an abundant number, since it is smaller than the sum of its proper divisors (8899194).

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

7045218 is a wasteful number, since it uses less digits than its factorization.

7045218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 7045218 is about 2654.2829540198. The cubic root of 7045218 is about 191.7041341582.

The spelling of 7045218 in words is "seven million, forty-five thousand, two hundred eighteen".