6420218 has 16 divisors (see below), whose sum is σ = 11082624. Its totient is φ = 2732400.

The previous prime is 6420199. The next prime is 6420221. The reversal of 6420218 is 8120246.

It is a super-3 number, since 3×6420218³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6420193 and 6420202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596 + ... + 3632.

It is an arithmetic number, because the mean of its divisors is an integer number (692664).

Almost surely, 2^6420218 is an apocalyptic number.

6420218 is a deficient number, since it is larger than the sum of its proper divisors (4662406).

6420218 is a wasteful number, since it uses less digits than its factorization.

6420218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 6420218 is about 2533.8149103674. The cubic root of 6420218 is about 185.8588554212.

The spelling of 6420218 in words is "six million, four hundred twenty thousand, two hundred eighteen".