2805290 has 32 divisors (see below), whose sum is σ = 5287680. Its totient is φ = 1070784.

The previous prime is 2805263. The next prime is 2805311. The reversal of 2805290 is 925082.

2805290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35471 + ... + 35549.

It is an arithmetic number, because the mean of its divisors is an integer number (165240).

2^2805290 is an apocalyptic number.

2805290 is a deficient number, since it is larger than the sum of its proper divisors (2482390).

2805290 is a wasteful number, since it uses less digits than its factorization.

2805290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2805290 is about 1674.8999970147. The cubic root of 2805290 is about 141.0346812062.

It can be divided in two parts, 2805 and 290, that multiplied together give a triangular number (813450 = T₁₂₇₅).

The spelling of 2805290 in words is "two million, eight hundred five thousand, two hundred ninety".