1800304 has 40 divisors (see below), whose sum is σ = 3897072. Its totient is φ = 798720.

The previous prime is 1800301. The next prime is 1800311. The reversal of 1800304 is 4030081.

1800304 = 17² + 18² + ... + 175².

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9232 + ... + 9424.

2^1800304 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 1800304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1948536).

1800304 is an abundant number, since it is smaller than the sum of its proper divisors (2096768).

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

1800304 is a wasteful number, since it uses less digits than its factorization.

1800304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1800304 is about 1341.7540758276. The cubic root of 1800304 is about 121.6508876349.

Adding to 1800304 its reverse (4030081), we get a palindrome (5830385).

The spelling of 1800304 in words is "one million, eight hundred thousand, three hundred four".