2808725 has 6 divisors (see below), whose sum is σ = 3482850. Its totient is φ = 2246960.

The previous prime is 2808721. The next prime is 2808733. The reversal of 2808725 is 5278082.

It can be written as a sum of positive squares in 3 ways, for example, as 418609 + 2390116 = 647^2 + 1546^2 .

It is not a de Polignac number, because 2808725 - 2² = 2808721 is a prime.

It is a super-2 number, since 2×2808725² = 15777872251250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2808691 and 2808700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56150 + ... + 56199.

It is an arithmetic number, because the mean of its divisors is an integer number (580475).

2^2808725 is an apocalyptic number.

2808725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2808725 is a deficient number, since it is larger than the sum of its proper divisors (674125).

2808725 is a wasteful number, since it uses less digits than its factorization.

2808725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112359 (or 112354 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 2808725 is about 1675.9251176589. The cubic root of 2808725 is about 141.0922220820.

The spelling of 2808725 in words is "two million, eight hundred eight thousand, seven hundred twenty-five".