2688128 has 16 divisors (see below), whose sum is σ = 5355510. Its totient is φ = 1344000.

The previous prime is 2688073. The next prime is 2688137. The reversal of 2688128 is 8218862.

It can be written as a sum of positive squares in only one way, i.e., 2534464 + 153664 = 1592^2 + 392^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10373 + ... + 10628.

2^2688128 is an apocalyptic number.

It is an amenable number.

2688128 is a deficient number, since it is larger than the sum of its proper divisors (2667382).

2688128 is an equidigital number, since it uses as much as digits as its factorization.

2688128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015 (or 21003 counting only the distinct ones).

The product of its digits is 12288, while the sum is 35.

The square root of 2688128 is about 1639.5511580918. The cubic root of 2688128 is about 139.0432727615.

The spelling of 2688128 in words is "two million, six hundred eighty-eight thousand, one hundred twenty-eight".