2806646 has 4 divisors (see below), whose sum is σ = 4209972. Its totient is φ = 1403322.

The previous prime is 2806619. The next prime is 2806651. The reversal of 2806646 is 6466082.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 701660 + ... + 701663.

It is an arithmetic number, because the mean of its divisors is an integer number (1052493).

2^2806646 is an apocalyptic number.

2806646 is a deficient number, since it is larger than the sum of its proper divisors (1403326).

2806646 is a wasteful number, since it uses less digits than its factorization.

2806646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403325.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 2806646 is about 1675.3047483965. The cubic root of 2806646 is about 141.0574016406.

The spelling of 2806646 in words is "two million, eight hundred six thousand, six hundred forty-six".