6404022 has 24 divisors (see below), whose sum is σ = 14390376. Its totient is φ = 2134512.

The previous prime is 6404017. The next prime is 6404023. The reversal of 6404022 is 2204046.

6404022 is a `hidden beast` number, since 640 + 4 + 0 + 22 = 666.

It is a super-2 number, since 2×6404022² = 82022995552968, which contains 22 as substring.

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 = 6403986 and 6404004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6103 + ... + 7074.

It is an arithmetic number, because the mean of its divisors is an integer number (599599).

Almost surely, 2^6404022 is an apocalyptic number.

6404022 is an abundant number, since it is smaller than the sum of its proper divisors (7986354).

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

6404022 is a wasteful number, since it uses less digits than its factorization.

6404022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13194 (or 13182 counting only the distinct ones).

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

The square root of 6404022 is about 2530.6169208318. The cubic root of 6404022 is about 185.7024378466.

Adding to 6404022 its reverse (2204046), we get a palindrome (8608068).

The spelling of 6404022 in words is "six million, four hundred four thousand, twenty-two".