816305 has 16 divisors (see below), whose sum is σ = 1137024. Its totient is φ = 551040.

The previous prime is 816271. The next prime is 816317. The reversal of 816305 is 503618.

816305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816305 - 2¹⁴ = 799921 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 816305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2765 + ... + 3045.

It is an arithmetic number, because the mean of its divisors is an integer number (71064).

2⁸¹⁶³⁰⁵ is an apocalyptic number.

It is an amenable number.

816305 is a deficient number, since it is larger than the sum of its proper divisors (320719).

816305 is a wasteful number, since it uses less digits than its factorization.

816305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 816305 is about 903.4959878162. The cubic root of 816305 is about 93.4582157660.

The spelling of 816305 in words is "eight hundred sixteen thousand, three hundred five".