6222420 has 120 divisors (see below), whose sum is σ = 20490624. Its totient is φ = 1577664.

The previous prime is 6222409. The next prime is 6222421. The reversal of 6222420 is 242226.

It is a happy number.

6222420 is a `hidden beast` number, since 622 + 2 + 42 + 0 = 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 = 6222393 and 6222402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6222421) 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 39 ways as a sum of consecutive naturals, for example, 37177 + ... + 37343.

Almost surely, 2^6222420 is an apocalyptic number.

6222420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6222420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10245312).

6222420 is an abundant number, since it is smaller than the sum of its proper divisors (14268204).

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

6222420 is a wasteful number, since it uses less digits than its factorization.

6222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 200 counting only the distinct ones).

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

The square root of 6222420 is about 2494.4779012852. The cubic root of 6222420 is about 183.9302271687.

Adding to 6222420 its reverse (242226), we get a palindrome (6464646).

The spelling of 6222420 in words is "six million, two hundred twenty-two thousand, four hundred twenty".