816204 has 24 divisors (see below), whose sum is σ = 2017008. Its totient is φ = 256000.

The previous prime is 816203. The next prime is 816209. The reversal of 816204 is 402618.

It is not an unprimeable number, because it can be changed into a prime (816203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797 + ... + 2204.

It is an arithmetic number, because the mean of its divisors is an integer number (84042).

2⁸¹⁶²⁰⁴ is an apocalyptic number.

It is an amenable number.

816204 is an abundant number, since it is smaller than the sum of its proper divisors (1200804).

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

816204 is a wasteful number, since it uses less digits than its factorization.

816204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 816204 is about 903.4400920924. The cubic root of 816204 is about 93.4543611328.

It can be divided in two parts, 816 and 204, that multiplied together give a square (166464 = 408²).

The spelling of 816204 in words is "eight hundred sixteen thousand, two hundred four".