2806641 has 12 divisors (see below), whose sum is σ = 4092660. Its totient is φ = 1853280.

The previous prime is 2806619. The next prime is 2806651. The reversal of 2806641 is 1466082.

It can be written as a sum of positive squares in 2 ways, for example, as 1766241 + 1040400 = 1329^2 + 1020^2 .

It is not a de Polignac number, because 2806641 - 2¹³ = 2798449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2806651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 450 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (341055).

2^2806641 is an apocalyptic number.

It is an amenable number.

2806641 is a deficient number, since it is larger than the sum of its proper divisors (1286019).

2806641 is a wasteful number, since it uses less digits than its factorization.

2806641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2806641 is about 1675.3032561301. The cubic root of 2806641 is about 141.0573178766.

The spelling of 2806641 in words is "two million, eight hundred six thousand, six hundred forty-one".