820200830 has 16 divisors (see below), whose sum is σ = 1516263840. Its totient is φ = 319213152.

The previous prime is 820200817. The next prime is 820200833. The reversal of 820200830 is 38002028.

It is a junction number, because it is equal to n+sod(n) for n = 820200796 and 820200805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820200833) 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, 1108010 + ... + 1108749.

It is an arithmetic number, because the mean of its divisors is an integer number (94766490).

Almost surely, 2^820200830 is an apocalyptic number.

820200830 is a deficient number, since it is larger than the sum of its proper divisors (696063010).

820200830 is a wasteful number, since it uses less digits than its factorization.

820200830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216803.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 820200830 is about 28639.1485557794. The cubic root of 820200830 is about 936.0665686395.

Adding to 820200830 its reverse (38002028), we get a palindrome (858202858).

The spelling of 820200830 in words is "eight hundred twenty million, two hundred thousand, eight hundred thirty".