2804857 has 4 divisors (see below), whose sum is σ = 3059856. Its totient is φ = 2549860.

The previous prime is 2804843. The next prime is 2804861. The reversal of 2804857 is 7584082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2804857 - 2⁷ = 2804729 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2804807) 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, 127483 + ... + 127504.

It is an arithmetic number, because the mean of its divisors is an integer number (764964).

2^2804857 is an apocalyptic number.

It is an amenable number.

2804857 is a deficient number, since it is larger than the sum of its proper divisors (254999).

2804857 is a wasteful number, since it uses less digits than its factorization.

2804857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254998.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2804857 is about 1674.7707305778. The cubic root of 2804857 is about 141.0274245400.

The spelling of 2804857 in words is "two million, eight hundred four thousand, eight hundred fifty-seven".