6783228 has 72 divisors (see below), whose sum is σ = 18520320. Its totient is φ = 2086560.

The previous prime is 6783223. The next prime is 6783239. The reversal of 6783228 is 8223876.

It is a happy number.

It is a super-3 number, since 3×6783228³ (a number of 21 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 6⁶ + 7⁸ + 8⁴ + 3¹¹ + 2¹⁸ + 2¹⁹ + 8⁴ .

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 6783192 and 6783201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6783223) 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, 32043 + ... + 32253.

Almost surely, 2^6783228 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 6783228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9260160).

6783228 is an abundant number, since it is smaller than the sum of its proper divisors (11737092).

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

6783228 is a wasteful number, since it uses less digits than its factorization.

6783228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 282 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 6783228 is about 2604.4630924626. The cubic root of 6783228 is about 189.2977585853.

The spelling of 6783228 in words is "six million, seven hundred eighty-three thousand, two hundred twenty-eight".