2725806 has 16 divisors (see below), whose sum is σ = 5490000. Its totient is φ = 902208.

The previous prime is 2725783. The next prime is 2725817. The reversal of 2725806 is 6085272.

2725806 = 824² + 825² + ... + 827².

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 631 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (343125).

2^2725806 is an apocalyptic number.

2725806 is an abundant number, since it is smaller than the sum of its proper divisors (2764194).

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

2725806 is a wasteful number, since it uses less digits than its factorization.

2725806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2725806 is about 1651.0015142331. The cubic root of 2725806 is about 139.6898918308.

The spelling of 2725806 in words is "two million, seven hundred twenty-five thousand, eight hundred six".