6420222 has 20 divisors (see below), whose sum is σ = 14386416. Its totient is φ = 2140020.

The previous prime is 6420221. The next prime is 6420259. The reversal of 6420222 is 2220246.

It is a happy number.

6420222 is a `hidden beast` number, since 642 + 0 + 2 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 6420195 and 6420204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19654 + ... + 19977.

Almost surely, 2^6420222 is an apocalyptic number.

6420222 is an abundant number, since it is smaller than the sum of its proper divisors (7966194).

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

6420222 is a wasteful number, since it uses less digits than its factorization.

6420222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39645 (or 39636 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 6420222 is about 2533.8156996909. The cubic root of 6420222 is about 185.8588940198.

Adding to 6420222 its reverse (2220246), we get a palindrome (8640468).

The spelling of 6420222 in words is "six million, four hundred twenty thousand, two hundred twenty-two".