6445218 has 32 divisors (see below), whose sum is σ = 14616000. Its totient is φ = 1878336.

The previous prime is 6445217. The next prime is 6445223. The reversal of 6445218 is 8125446.

It is not an unprimeable number, because it can be changed into a prime (6445213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (456750).

Almost surely, 2^6445218 is an apocalyptic number.

6445218 is an abundant number, since it is smaller than the sum of its proper divisors (8170782).

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

6445218 is a wasteful number, since it uses less digits than its factorization.

6445218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386.

The product of its digits is 7680, while the sum is 30.

The square root of 6445218 is about 2538.7433899471. The cubic root of 6445218 is about 186.0997845899.

The spelling of 6445218 in words is "six million, four hundred forty-five thousand, two hundred eighteen".