2505728 has 22 divisors (see below), whose sum is σ = 5011056. Its totient is φ = 1252352.

The previous prime is 2505707. The next prime is 2505743. The reversal of 2505728 is 8275052.

It is a self number, because there is not a number n which added to its sum of digits gives 2505728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200 + ... + 2247.

2^2505728 is an apocalyptic number.

It is an amenable number.

2505728 is a deficient number, since it is larger than the sum of its proper divisors (2505328).

2505728 is an equidigital number, since it uses as much as digits as its factorization.

2505728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2505728 is about 1582.9491463720. The cubic root of 2505728 is about 135.8244563266.

The spelling of 2505728 in words is "two million, five hundred five thousand, seven hundred twenty-eight".