2028081889 has 2 divisors, whose sum is σ = 2028081890. Its totient is φ = 2028081888.

The previous prime is 2028081859. The next prime is 2028081943. The reversal of 2028081889 is 9881808202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1963198864 + 64883025 = 44308^2 + 8055^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028081889 - 2⁵ = 2028081857 is a prime.

It is a super-2 number, since 2×2028081889² = 8226232296979616642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2028081859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014040944 + 1014040945.

It is an arithmetic number, because the mean of its divisors is an integer number (1014040945).

Almost surely, 2^2028081889 is an apocalyptic number.

It is an amenable number.

2028081889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028081889 is an equidigital number, since it uses as much as digits as its factorization.

2028081889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 2028081889 is about 45034.2301921549. The cubic root of 2028081889 is about 1265.7904913579.

The spelling of 2028081889 in words is "two billion, twenty-eight million, eighty-one thousand, eight hundred eighty-nine".