2587728 has 120 divisors (see below), whose sum is σ = 8169120. Its totient is φ = 698880.

The previous prime is 2587727. The next prime is 2587747. The reversal of 2587728 is 8277852.

2587728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2587727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89218 + ... + 89246.

It is an arithmetic number, because the mean of its divisors is an integer number (68076).

2^2587728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2587728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4084560).

2587728 is an abundant number, since it is smaller than the sum of its proper divisors (5581392).

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

2587728 is a wasteful number, since it uses less digits than its factorization.

2587728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 58 counting only the distinct ones).

The product of its digits is 62720, while the sum is 39.

The square root of 2587728 is about 1608.6416630188. The cubic root of 2587728 is about 137.2902012621.

The spelling of 2587728 in words is "two million, five hundred eighty-seven thousand, seven hundred twenty-eight".