2028257 has 24 divisors (see below), whose sum is σ = 2659392. Its totient is φ = 1528800.

The previous prime is 2028241. The next prime is 2028263. The reversal of 2028257 is 7528202.

It is not a de Polignac number, because 2028257 - 2⁴ = 2028241 is a prime.

It is a super-2 number, since 2×2028257² = 8227652916098, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028217) 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 23 ways as a sum of consecutive naturals, for example, 28532 + ... + 28602.

It is an arithmetic number, because the mean of its divisors is an integer number (110808).

2^2028257 is an apocalyptic number.

It is an amenable number.

2028257 is a deficient number, since it is larger than the sum of its proper divisors (631135).

2028257 is a wasteful number, since it uses less digits than its factorization.

2028257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2028257 is about 1424.1688804352. The cubic root of 2028257 is about 126.5826921093.

Subtracting 2028257 from its reverse (7528202), we obtain a palindrome (5499945).

The spelling of 2028257 in words is "two million, twenty-eight thousand, two hundred fifty-seven".