2804863 has 4 divisors (see below), whose sum is σ = 2815560. Its totient is φ = 2794168.

The previous prime is 2804861. The next prime is 2804887. The reversal of 2804863 is 3684082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3684082 = 2 ⋅1842041.

It is a cyclic number.

It is not a de Polignac number, because 2804863 - 2¹ = 2804861 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2804861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4945 + ... + 5482.

It is an arithmetic number, because the mean of its divisors is an integer number (703890).

2^2804863 is an apocalyptic number.

2804863 is a deficient number, since it is larger than the sum of its proper divisors (10697).

2804863 is a wasteful number, since it uses less digits than its factorization.

2804863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10696.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 2804863 is about 1674.7725218668. The cubic root of 2804863 is about 141.0275250994.

The spelling of 2804863 in words is "two million, eight hundred four thousand, eight hundred sixty-three".