2163728 has 20 divisors (see below), whose sum is σ = 4791360. Its totient is φ = 927264.

The previous prime is 2163703. The next prime is 2163737. The reversal of 2163728 is 8273612.

It is a happy number.

2163728 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2163728.

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, 9548 + ... + 9771.

It is an arithmetic number, because the mean of its divisors is an integer number (239568).

2^2163728 is an apocalyptic number.

2163728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2163728 is an abundant number, since it is smaller than the sum of its proper divisors (2627632).

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

2163728 is a wasteful number, since it uses less digits than its factorization.

2163728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19334 (or 19328 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 2163728 is about 1470.9615902531. The cubic root of 2163728 is about 129.3404065521.

The spelling of 2163728 in words is "two million, one hundred sixty-three thousand, seven hundred twenty-eight".