820314770 has 32 divisors (see below), whose sum is σ = 1705556736. Its totient is φ = 280748800.

The previous prime is 820314767. The next prime is 820314809. The reversal of 820314770 is 77413028.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217466 + ... + 221205.

It is an arithmetic number, because the mean of its divisors is an integer number (53298648).

Almost surely, 2^820314770 is an apocalyptic number.

820314770 is an abundant number, since it is smaller than the sum of its proper divisors (885241966).

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

820314770 is a wasteful number, since it uses less digits than its factorization.

820314770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438706.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 820314770 is about 28641.1377218155. The cubic root of 820314770 is about 936.1099118804.

Adding to 820314770 its reverse (77413028), we get a palindrome (897727798).

The spelling of 820314770 in words is "eight hundred twenty million, three hundred fourteen thousand, seven hundred seventy".