2870820869 has 12 divisors (see below), whose sum is σ = 3372596748. Its totient is φ = 2436336000.

The previous prime is 2870820863. The next prime is 2870820871. The reversal of 2870820869 is 9680280782.

It can be written as a sum of positive squares in 2 ways, for example, as 2073436225 + 797384644 = 45535^2 + 28238^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2870820869 is a prime.

It is a super-2 number, since 2×2870820869² = 16483224923771830322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2870820863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285092 + ... + 294989.

It is an arithmetic number, because the mean of its divisors is an integer number (281049729).

Almost surely, 2^2870820869 is an apocalyptic number.

It is an amenable number.

2870820869 is a deficient number, since it is larger than the sum of its proper divisors (501775879).

2870820869 is a wasteful number, since it uses less digits than its factorization.

2870820869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580196 (or 580189 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 2870820869 is about 53580.0417039778. The cubic root of 2870820869 is about 1421.2441765357.

The spelling of 2870820869 in words is "two billion, eight hundred seventy million, eight hundred twenty thousand, eight hundred sixty-nine".