2500728 has 32 divisors (see below), whose sum is σ = 6469200. Its totient is φ = 804608.

The previous prime is 2500727. The next prime is 2500733. The reversal of 2500728 is 8270052.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 2500698 and 2500707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101 + ... + 2492.

2^2500728 is an apocalyptic number.

It is an amenable number.

2500728 is an abundant number, since it is smaller than the sum of its proper divisors (3968472).

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

2500728 is a wasteful number, since it uses less digits than its factorization.

2500728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 2500728 is about 1581.3690271407. The cubic root of 2500728 is about 135.7340535247.

The spelling of 2500728 in words is "two million, five hundred thousand, seven hundred twenty-eight".