2128668 has 24 divisors (see below), whose sum is σ = 4999680. Its totient is φ = 704880.

The previous prime is 2128667. The next prime is 2128669. The reversal of 2128668 is 8668212.

It is an interprime number because it is at equal distance from previous prime (2128667) and next prime (2128669).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (208320).

2^2128668 is an apocalyptic number.

It is an amenable number.

2128668 is an abundant number, since it is smaller than the sum of its proper divisors (2871012).

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

2128668 is a wasteful number, since it uses less digits than its factorization.

2128668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1175 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 2128668 is about 1458.9955448870. The cubic root of 2128668 is about 128.6380092542.

The spelling of 2128668 in words is "two million, one hundred twenty-eight thousand, six hundred sixty-eight".