210804 has 24 divisors (see below), whose sum is σ = 536928. Its totient is φ = 63840.

The previous prime is 210803. The next prime is 210809. The reversal of 210804 is 408012.

It is a super-3 number, since 3×210804³ = 28103330885395392, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210804.

It is not an unprimeable number, because it can be changed into a prime (210803) 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, 667 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (22372).

2²¹⁰⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

210804 is an abundant number, since it is smaller than the sum of its proper divisors (326124).

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

210804 is a wasteful number, since it uses less digits than its factorization.

210804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 210804 is about 459.1339673777. The cubic root of 210804 is about 59.5149786925.

Adding to 210804 its reverse (408012), we get a palindrome (618816).

The spelling of 210804 in words is "two hundred ten thousand, eight hundred four".