1803204 has 36 divisors (see below), whose sum is σ = 4909996. Its totient is φ = 554688.

The previous prime is 1803203. The next prime is 1803209. The reversal of 1803204 is 4023081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1166400 + 636804 = 1080^2 + 798^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803203) 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, 1459 + ... + 2394.

2^1803204 is an apocalyptic number.

It is an amenable number.

1803204 is an abundant number, since it is smaller than the sum of its proper divisors (3106792).

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

1803204 is a wasteful number, since it uses less digits than its factorization.

1803204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876 (or 3871 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1803204 is about 1342.8343159154. The cubic root of 1803204 is about 121.7161725933.

Adding to 1803204 its reverse (4023081), we get a palindrome (5826285).

The spelling of 1803204 in words is "one million, eight hundred three thousand, two hundred four".