2028865405 has 16 divisors (see below), whose sum is σ = 2783176704. Its totient is φ = 1390855680.

The previous prime is 2028865367. The next prime is 2028865409. The reversal of 2028865405 is 5045688202.

It is not a de Polignac number, because 2028865405 - 2¹³ = 2028857213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028865409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244525 + ... + 252685.

It is an arithmetic number, because the mean of its divisors is an integer number (173948544).

Almost surely, 2^2028865405 is an apocalyptic number.

It is an amenable number.

2028865405 is a deficient number, since it is larger than the sum of its proper divisors (754311299).

2028865405 is an equidigital number, since it uses as much as digits as its factorization.

2028865405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15276.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 2028865405 is about 45042.9284682957. The cubic root of 2028865405 is about 1265.9534761331.

The spelling of 2028865405 in words is "two billion, twenty-eight million, eight hundred sixty-five thousand, four hundred five".