2028267865 has 24 divisors (see below), whose sum is σ = 2685334680. Its totient is φ = 1469505024.

The previous prime is 2028267853. The next prime is 2028267893. The reversal of 2028267865 is 5687628202.

It can be written as a sum of positive squares in 12 ways, for example, as 572692761 + 1455575104 = 23931^2 + 38152^2 .

It is not a de Polignac number, because 2028267865 - 2⁵ = 2028267833 is a prime.

It is a super-2 number, since 2×2028267865² = 8227741064383316450, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 22141 + ... + 67429.

It is an arithmetic number, because the mean of its divisors is an integer number (111888945).

Almost surely, 2^2028267865 is an apocalyptic number.

It is an amenable number.

2028267865 is a deficient number, since it is larger than the sum of its proper divisors (657066815).

2028267865 is a wasteful number, since it uses less digits than its factorization.

2028267865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45373 (or 45360 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 2028267865 is about 45036.2949741650. The cubic root of 2028267865 is about 1265.8291813566.

The spelling of 2028267865 in words is "two billion, twenty-eight million, two hundred sixty-seven thousand, eight hundred sixty-five".