820169298 has 24 divisors (see below), whose sum is σ = 1913728908. Its totient is φ = 252359712.

The previous prime is 820169293. The next prime is 820169323. The reversal of 820169298 is 892961028.

It can be written as a sum of positive squares in 2 ways, for example, as 798797169 + 21372129 = 28263^2 + 4623^2 .

It is not an unprimeable number, because it can be changed into a prime (820169293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1752265 + ... + 1752732.

Almost surely, 2^820169298 is an apocalyptic number.

820169298 is an abundant number, since it is smaller than the sum of its proper divisors (1093559610).

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

820169298 is a wasteful number, since it uses less digits than its factorization.

820169298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505018 (or 3505015 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 820169298 is about 28638.5980452954. The cubic root of 820169298 is about 936.0545730289.

The spelling of 820169298 in words is "eight hundred twenty million, one hundred sixty-nine thousand, two hundred ninety-eight".