1684228 has 36 divisors (see below), whose sum is σ = 3697932. Its totient is φ = 665280.

The previous prime is 1684223. The next prime is 1684229. The reversal of 1684228 is 8224861.

It can be written as a sum of positive squares in 2 ways, for example, as 777924 + 906304 = 882^2 + 952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1684228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2218 + ... + 2878.

2^1684228 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 1684228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848966).

1684228 is an abundant number, since it is smaller than the sum of its proper divisors (2013704).

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

1684228 is a wasteful number, since it uses less digits than its factorization.

1684228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 683 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 1684228 is about 1297.7781012176. The cubic root of 1684228 is about 118.9780813148.

The spelling of 1684228 in words is "one million, six hundred eighty-four thousand, two hundred twenty-eight".