2028449 has 4 divisors (see below), whose sum is σ = 2032020. Its totient is φ = 2024880.

The previous prime is 2028443. The next prime is 2028461. The reversal of 2028449 is 9448202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9448202 = 2 ⋅4724101.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 1364224 = 815^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028449 - 2²⁰ = 979873 is a prime.

It is a super-2 number, since 2×2028449² = 8229210691202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028443) 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 in 3 ways as a sum of consecutive naturals, for example, 722 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (508005).

2^2028449 is an apocalyptic number.

It is an amenable number.

2028449 is a deficient number, since it is larger than the sum of its proper divisors (3571).

2028449 is an equidigital number, since it uses as much as digits as its factorization.

2028449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2028449 is about 1424.2362865761. The cubic root of 2028449 is about 126.5866861972.

The spelling of 2028449 in words is "two million, twenty-eight thousand, four hundred forty-nine".