816830 has 24 divisors (see below), whose sum is σ = 1711368. Its totient is φ = 279888.

The previous prime is 816821. The next prime is 816839. The reversal of 816830 is 38618.

It is an interprime number because it is at equal distance from previous prime (816821) and next prime (816839).

It is a super-2 number, since 2×816830² = 1334422497800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344 + ... + 1323.

It is an arithmetic number, because the mean of its divisors is an integer number (71307).

2⁸¹⁶⁸³⁰ is an apocalyptic number.

816830 is an abundant number, since it is smaller than the sum of its proper divisors (894538).

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

816830 is a wasteful number, since it uses less digits than its factorization.

816830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 816830 is about 903.7864792084. The cubic root of 816830 is about 93.4782471058.

The spelling of 816830 in words is "eight hundred sixteen thousand, eight hundred thirty".