2809898 has 16 divisors (see below), whose sum is σ = 5187840. Its totient is φ = 1111536.

The previous prime is 2809889. The next prime is 2809903. The reversal of 2809898 is 8989082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7538 + ... + 7901.

It is an arithmetic number, because the mean of its divisors is an integer number (324240).

2^2809898 is an apocalyptic number.

2809898 is a deficient number, since it is larger than the sum of its proper divisors (2377942).

2809898 is a wasteful number, since it uses less digits than its factorization.

2809898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15461.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 2809898 is about 1676.2750370986. The cubic root of 2809898 is about 141.1118606657. Note that the first 3 decimals are identical.

The spelling of 2809898 in words is "two million, eight hundred nine thousand, eight hundred ninety-eight".