6731228 has 36 divisors (see below), whose sum is σ = 13952232. Its totient is φ = 2832480.

The previous prime is 6731183. The next prime is 6731239. The reversal of 6731228 is 8221376.

It is a happy number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6731228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11675 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (387562).

Almost surely, 2^6731228 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 6731228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6976116).

6731228 is an abundant number, since it is smaller than the sum of its proper divisors (7221004).

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

6731228 is a wasteful number, since it uses less digits than its factorization.

6731228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 633 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 6731228 is about 2594.4610230258. The cubic root of 6731228 is about 188.8128004703.

The spelling of 6731228 in words is "six million, seven hundred thirty-one thousand, two hundred twenty-eight".