7028218 has 4 divisors (see below), whose sum is σ = 10542330. Its totient is φ = 3514108.

The previous prime is 7028213. The next prime is 7028243. The reversal of 7028218 is 8128207.

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

It can be written as a sum of positive squares in only one way, i.e., 7006609 + 21609 = 2647^2 + 147^2 .

It is not an unprimeable number, because it can be changed into a prime (7028213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1757053 + ... + 1757056.

Almost surely, 2^7028218 is an apocalyptic number.

7028218 is a deficient number, since it is larger than the sum of its proper divisors (3514112).

7028218 is a wasteful number, since it uses less digits than its factorization.

7028218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514111.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 7028218 is about 2651.0786483996. The cubic root of 7028218 is about 191.5498169517.

The spelling of 7028218 in words is "seven million, twenty-eight thousand, two hundred eighteen".