811830 has 16 divisors (see below), whose sum is σ = 1948464. Its totient is φ = 216480.

The previous prime is 811819. The next prime is 811861. The reversal of 811830 is 38118.

It is a happy number.

811830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 811797 and 811806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13501 + ... + 13560.

It is an arithmetic number, because the mean of its divisors is an integer number (121779).

2⁸¹¹⁸³⁰ is an apocalyptic number.

811830 is an abundant number, since it is smaller than the sum of its proper divisors (1136634).

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

811830 is a wasteful number, since it uses less digits than its factorization.

811830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27071.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 811830 is about 901.0160930860. The cubic root of 811830 is about 93.2871228160.

Adding to 811830 its reverse (38118), we get a palindrome (849948).

The spelling of 811830 in words is "eight hundred eleven thousand, eight hundred thirty".