2128864 has 24 divisors (see below), whose sum is σ = 4254768. Its totient is φ = 1048320.

The previous prime is 2128849. The next prime is 2128871. The reversal of 2128864 is 4688212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (177282).

2^2128864 is an apocalyptic number.

It is an amenable number.

2128864 is a deficient number, since it is larger than the sum of its proper divisors (2125904).

2128864 is an equidigital number, since it uses as much as digits as its factorization.

2128864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1010 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 2128864 is about 1459.0627128400. The cubic root of 2128864 is about 128.6419573063.

It can be divided in two parts, 2128 and 864, that added together give a palindrome (2992).

The spelling of 2128864 in words is "two million, one hundred twenty-eight thousand, eight hundred sixty-four".