820030 has 8 divisors (see below), whose sum is σ = 1476072. Its totient is φ = 328008.

The previous prime is 819991. The next prime is 820037. The reversal of 820030 is 30028.

820030 is nontrivially palindromic in base 3.

820030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820037) by changing a digit.

820030 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40992 + ... + 41011.

It is an arithmetic number, because the mean of its divisors is an integer number (184509).

2⁸²⁰⁰³⁰ is an apocalyptic number.

820030 is a deficient number, since it is larger than the sum of its proper divisors (656042).

820030 is a wasteful number, since it uses less digits than its factorization.

820030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82010.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 820030 is about 905.5550783911. Note that the first 3 decimals coincide. The cubic root of 820030 is about 93.6001576689.

Adding to 820030 its reverse (30028), we get a palindrome (850058).

The spelling of 820030 in words is "eight hundred twenty thousand, thirty".