813830 has 16 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 321792.

The previous prime is 813829. The next prime is 813833. The reversal of 813830 is 38318.

It is a junction number, because it is equal to n+sod(n) for n = 813796 and 813805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813833) 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, 551 + ... + 1389.

It is an arithmetic number, because the mean of its divisors is an integer number (92610).

2⁸¹³⁸³⁰ is an apocalyptic number.

813830 is a deficient number, since it is larger than the sum of its proper divisors (667930).

813830 is a wasteful number, since it uses less digits than its factorization.

813830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 813830 is about 902.1252684633. The cubic root of 813830 is about 93.3636664446.

The spelling of 813830 in words is "eight hundred thirteen thousand, eight hundred thirty".