2028881 has 2 divisors, whose sum is σ = 2028882. Its totient is φ = 2028880.

The previous prime is 2028863. The next prime is 2028907. The reversal of 2028881 is 1888202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1731856 + 297025 = 1316^2 + 545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2028881 is a prime.

It is a super-2 number, since 2×2028881² = 8232716224322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2028841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014440 + 1014441.

It is an arithmetic number, because the mean of its divisors is an integer number (1014441).

2^2028881 is an apocalyptic number.

It is an amenable number.

2028881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028881 is an equidigital number, since it uses as much as digits as its factorization.

2028881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 2028881 is about 1424.3879387302. The cubic root of 2028881 is about 126.5956719735.

The spelling of 2028881 in words is "two million, twenty-eight thousand, eight hundred eighty-one".