820050385 has 16 divisors (see below), whose sum is σ = 1226881152. Its totient is φ = 511200000.

The previous prime is 820050331. The next prime is 820050419. The reversal of 820050385 is 583050028.

820050385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 820050385 - 2⁹ = 820049873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1064616 + ... + 1065385.

It is an arithmetic number, because the mean of its divisors is an integer number (76680072).

Almost surely, 2^820050385 is an apocalyptic number.

It is an amenable number.

820050385 is a deficient number, since it is larger than the sum of its proper divisors (406830767).

820050385 is a wasteful number, since it uses less digits than its factorization.

820050385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130024.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 820050385 is about 28636.5218733002. The cubic root of 820050385 is about 936.0093325980.

It can be divided in two parts, 8200 and 50385, that added together give a palindrome (58585).

The spelling of 820050385 in words is "eight hundred twenty million, fifty thousand, three hundred eighty-five".