6404222 has 8 divisors (see below), whose sum is σ = 10479672. Its totient is φ = 2911000.

The previous prime is 6404191. The next prime is 6404227. The reversal of 6404222 is 2224046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6404194 and 6404203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145529 + ... + 145572.

It is an arithmetic number, because the mean of its divisors is an integer number (1309959).

Almost surely, 2^6404222 is an apocalyptic number.

6404222 is a deficient number, since it is larger than the sum of its proper divisors (4075450).

6404222 is a wasteful number, since it uses less digits than its factorization.

6404222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291114.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 6404222 is about 2530.6564365793. The cubic root of 6404222 is about 185.7043710120.

Adding to 6404222 its reverse (2224046), we get a palindrome (8628268).

The spelling of 6404222 in words is "six million, four hundred four thousand, two hundred twenty-two".