6390228 has 72 divisors (see below), whose sum is σ = 16970688. Its totient is φ = 1867008.

The previous prime is 6390227. The next prime is 6390239. The reversal of 6390228 is 8220936.

It is a junction number, because it is equal to n+sod(n) for n = 6390195 and 6390204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46576 + ... + 46712.

It is an arithmetic number, because the mean of its divisors is an integer number (235704).

Almost surely, 2^6390228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6390228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8485344).

6390228 is an abundant number, since it is smaller than the sum of its proper divisors (10580460).

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

6390228 is a wasteful number, since it uses less digits than its factorization.

6390228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 6390228 is about 2527.8900292536. The cubic root of 6390228 is about 185.5690101970.

The spelling of 6390228 in words is "six million, three hundred ninety thousand, two hundred twenty-eight".