6428218 has 4 divisors (see below), whose sum is σ = 9642330. Its totient is φ = 3214108.

The previous prime is 6428207. The next prime is 6428263. The reversal of 6428218 is 8128246.

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., 6185169 + 243049 = 2487^2 + 493^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6428218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607053 + ... + 1607056.

Almost surely, 2^6428218 is an apocalyptic number.

6428218 is a deficient number, since it is larger than the sum of its proper divisors (3214112).

6428218 is a wasteful number, since it uses less digits than its factorization.

6428218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214111.

The product of its digits is 6144, while the sum is 31.

The square root of 6428218 is about 2535.3930661734. The cubic root of 6428218 is about 185.9360206977.

It can be divided in two parts, 64 and 28218, that added together give a palindrome (28282).

The spelling of 6428218 in words is "six million, four hundred twenty-eight thousand, two hundred eighteen".