2028001889 has 2 divisors, whose sum is σ = 2028001890. Its totient is φ = 2028001888.

The previous prime is 2028001861. The next prime is 2028001907. The reversal of 2028001889 is 9881008202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1878355600 + 149646289 = 43340^2 + 12233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028001889 - 2¹² = 2027997793 is a prime.

It is a super-2 number, since 2×2028001889² = 8225583323575136642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2028001189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014000944 + 1014000945.

It is an arithmetic number, because the mean of its divisors is an integer number (1014000945).

Almost surely, 2^2028001889 is an apocalyptic number.

It is an amenable number.

2028001889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028001889 is an equidigital number, since it uses as much as digits as its factorization.

2028001889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 2028001889 is about 45033.3419701447. The cubic root of 2028001889 is about 1265.7738476231.

The spelling of 2028001889 in words is "two billion, twenty-eight million, one thousand, eight hundred eighty-nine".