2028845 has 30 divisors (see below), whose sum is σ = 3075498. Its totient is φ = 1284192.

The previous prime is 2028841. The next prime is 2028847. The reversal of 2028845 is 5488202.

It can be written as a sum of positive squares in 3 ways, for example, as 9604 + 2019241 = 98^2 + 1421^2 .

It is not a de Polignac number, because 2028845 - 2² = 2028841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028841) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 156059 + ... + 156071.

2^2028845 is an apocalyptic number.

It is an amenable number.

2028845 is a deficient number, since it is larger than the sum of its proper divisors (1046653).

2028845 is an frugal number, since it uses more digits than its factorization.

2028845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 2028845 is about 1424.3753016674. The cubic root of 2028845 is about 126.5949232075.

Multiplying 2028845 by its product of nonzero digits (5120), we get a square (10387686400 = 101920²).

The spelling of 2028845 in words is "two million, twenty-eight thousand, eight hundred forty-five".