2803861 has 16 divisors (see below), whose sum is σ = 3172608. Its totient is φ = 2464000.

The previous prime is 2803847. The next prime is 2803873. The reversal of 2803861 is 1683082.

It is a cyclic number.

It is not a de Polignac number, because 2803861 - 2²¹ = 706709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2803891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27711 + ... + 27811.

It is an arithmetic number, because the mean of its divisors is an integer number (198288).

2^2803861 is an apocalyptic number.

It is an amenable number.

2803861 is a deficient number, since it is larger than the sum of its proper divisors (368747).

2803861 is a wasteful number, since it uses less digits than its factorization.

2803861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2803861 is about 1674.4733500417. The cubic root of 2803861 is about 141.0107296967.

The spelling of 2803861 in words is "two million, eight hundred three thousand, eight hundred sixty-one".