816304 has 20 divisors (see below), whose sum is σ = 1596376. Its totient is φ = 404352.

The previous prime is 816271. The next prime is 816317. The reversal of 816304 is 403618.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2452 + ... + 2764.

2⁸¹⁶³⁰⁴ is an apocalyptic number.

It is an amenable number.

816304 is a deficient number, since it is larger than the sum of its proper divisors (780072).

816304 is a wasteful number, since it uses less digits than its factorization.

816304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 816304 is about 903.4954344102. The cubic root of 816304 is about 93.4581776029.

Subtracting from 816304 its reverse (403618), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 816304 in words is "eight hundred sixteen thousand, three hundred four".