815830 has 16 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 307072.

The previous prime is 815821. The next prime is 815831. The reversal of 815830 is 38518.

It is a junction number, because it is equal to n+sod(n) for n = 815795 and 815804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815831) 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 7 ways as a sum of consecutive naturals, for example, 2230 + ... + 2569.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2⁸¹⁵⁸³⁰ is an apocalyptic number.

815830 is a deficient number, since it is larger than the sum of its proper divisors (739370).

815830 is a wasteful number, since it uses less digits than its factorization.

815830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 815830 is about 903.2330817679. The cubic root of 815830 is about 93.4400847709.

The spelling of 815830 in words is "eight hundred fifteen thousand, eight hundred thirty".