2028666 has 32 divisors (see below), whose sum is σ = 4276800. Its totient is φ = 640640.

The previous prime is 2028647. The next prime is 2028667. The reversal of 2028666 is 6668202.

2028666 = T₁₂₆ + T₁₂₇ + ... + T₂₄₁.

It is not an unprimeable number, because it can be changed into a prime (2028667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15421 + ... + 15551.

It is an arithmetic number, because the mean of its divisors is an integer number (133650).

2^2028666 is an apocalyptic number.

2028666 is an abundant number, since it is smaller than the sum of its proper divisors (2248134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2028666 is a wasteful number, since it uses less digits than its factorization.

2028666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2028666 is about 1424.3124657181. The cubic root of 2028666 is about 126.5912000452.

The spelling of 2028666 in words is "two million, twenty-eight thousand, six hundred sixty-six".