2028889 has 4 divisors (see below), whose sum is σ = 2056756. Its totient is φ = 2001024.

The previous prime is 2028881. The next prime is 2028907. The reversal of 2028889 is 9888202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9888202 = 2 ⋅4944101.

It can be written as a sum of positive squares in 2 ways, for example, as 478864 + 1550025 = 692^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028889 - 2³ = 2028881 is a prime.

It is a Duffinian number.

2028889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2028881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13824 + ... + 13969.

It is an arithmetic number, because the mean of its divisors is an integer number (514189).

2^2028889 is an apocalyptic number.

It is an amenable number.

2028889 is a deficient number, since it is larger than the sum of its proper divisors (27867).

2028889 is an equidigital number, since it uses as much as digits as its factorization.

2028889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27866.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2028889 is about 1424.3907469511. The cubic root of 2028889 is about 126.5958383647.

The spelling of 2028889 in words is "two million, twenty-eight thousand, eight hundred eighty-nine".