2028655281 has 4 divisors (see below), whose sum is σ = 2704873712. Its totient is φ = 1352436852.

The previous prime is 2028655273. The next prime is 2028655301. The reversal of 2028655281 is 1825568202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2028655281 - 2³ = 2028655273 is a prime.

It is a super-2 number, since 2×2028655281² = 8230884498258377922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2028635281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 338109211 + ... + 338109216.

It is an arithmetic number, because the mean of its divisors is an integer number (676218428).

Almost surely, 2^2028655281 is an apocalyptic number.

It is an amenable number.

2028655281 is a deficient number, since it is larger than the sum of its proper divisors (676218431).

2028655281 is an equidigital number, since it uses as much as digits as its factorization.

2028655281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676218430.

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 2028655281 is about 45040.5959219014. The cubic root of 2028655281 is about 1265.9097708531.

The spelling of 2028655281 in words is "two billion, twenty-eight million, six hundred fifty-five thousand, two hundred eighty-one".