2805642 has 36 divisors (see below), whose sum is σ = 7073586. Its totient is φ = 801360.

The previous prime is 2805637. The next prime is 2805643. The reversal of 2805642 is 2465082.

It can be written as a sum of positive squares in only one way, i.e., 2752281 + 53361 = 1659^2 + 231^2 .

It is not an unprimeable number, because it can be changed into a prime (2805643) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 709 + ... + 2472.

2^2805642 is an apocalyptic number.

2805642 is an abundant number, since it is smaller than the sum of its proper divisors (4267944).

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

2805642 is a wasteful number, since it uses less digits than its factorization.

2805642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2805642 is about 1675.0050746192. The cubic root of 2805642 is about 141.0405798395.

The spelling of 2805642 in words is "two million, eight hundred five thousand, six hundred forty-two".