820834130 has 16 divisors (see below), whose sum is σ = 1488288600. Its totient is φ = 325936512.

The previous prime is 820834109. The next prime is 820834177. The reversal of 820834130 is 31438028.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 794506969 + 26327161 = 28187^2 + 5131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 820834093 and 820834102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298205 + ... + 300944.

Almost surely, 2^820834130 is an apocalyptic number.

820834130 is a deficient number, since it is larger than the sum of its proper divisors (667454470).

820834130 is a wasteful number, since it uses less digits than its factorization.

820834130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599293.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 820834130 is about 28650.2029661222. The cubic root of 820834130 is about 936.3074277179.

The spelling of 820834130 in words is "eight hundred twenty million, eight hundred thirty-four thousand, one hundred thirty".