2028557 has 4 divisors (see below), whose sum is σ = 2078076. Its totient is φ = 1979040.

The previous prime is 2028527. The next prime is 2028581. The reversal of 2028557 is 7558202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7558202 = 2 ⋅3779101.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 1779556 = 499^2 + 1334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028557 - 2⁶ = 2028493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028517) 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, 24698 + ... + 24779.

It is an arithmetic number, because the mean of its divisors is an integer number (519519).

2^2028557 is an apocalyptic number.

It is an amenable number.

2028557 is a deficient number, since it is larger than the sum of its proper divisors (49519).

2028557 is an equidigital number, since it uses as much as digits as its factorization.

2028557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49518.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2028557 is about 1424.2742011284. The cubic root of 2028557 is about 126.5889327609.

The spelling of 2028557 in words is "two million, twenty-eight thousand, five hundred fifty-seven".