6420228 has 12 divisors (see below), whose sum is σ = 14980560. Its totient is φ = 2140072.

The previous prime is 6420221. The next prime is 6420259. The reversal of 6420228 is 8220246.

6420228 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 6420198 and 6420207.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267498 + ... + 267521.

It is an arithmetic number, because the mean of its divisors is an integer number (1248380).

Almost surely, 2^6420228 is an apocalyptic number.

It is an amenable number.

6420228 is an abundant number, since it is smaller than the sum of its proper divisors (8560332).

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

6420228 is a wasteful number, since it uses less digits than its factorization.

6420228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535026 (or 535024 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 6420228 is about 2533.8168836757. The cubic root of 6420228 is about 185.8589519178.

The spelling of 6420228 in words is "six million, four hundred twenty thousand, two hundred twenty-eight".