830805 has 16 divisors (see below), whose sum is σ = 1345344. Its totient is φ = 437760.

The previous prime is 830801. The next prime is 830827. The reversal of 830805 is 508038.

830805 = 48² + 49² + ... + 137².

It is not a de Polignac number, because 830805 - 2² = 830801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830801) 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 15 ways as a sum of consecutive naturals, for example, 1170 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (84084).

2⁸³⁰⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

830805 is a deficient number, since it is larger than the sum of its proper divisors (514539).

830805 is a wasteful number, since it uses less digits than its factorization.

830805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 830805 is about 911.4850519893. The cubic root of 830805 is about 94.0083363664.

The spelling of 830805 in words is "eight hundred thirty thousand, eight hundred five".