818930 has 16 divisors (see below), whose sum is σ = 1684800. Its totient is φ = 280752.

The previous prime is 818897. The next prime is 818947. The reversal of 818930 is 39818.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 818893 and 818902.

It is an unprimeable number.

818930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 5780 + ... + 5919.

It is an arithmetic number, because the mean of its divisors is an integer number (105300).

2⁸¹⁸⁹³⁰ is an apocalyptic number.

818930 is an abundant number, since it is smaller than the sum of its proper divisors (865870).

It is a weird number, because it is abundant, but not a pseudoperfect number.

818930 is a wasteful number, since it uses less digits than its factorization.

818930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11713.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 818930 is about 904.9475122901. The cubic root of 818930 is about 93.5582867434.

The spelling of 818930 in words is "eight hundred eighteen thousand, nine hundred thirty".