2804643 has 24 divisors (see below), whose sum is σ = 4481568. Its totient is φ = 1681152.

The previous prime is 2804639. The next prime is 2804693. The reversal of 2804643 is 3464082.

It is not a de Polignac number, because 2804643 - 2² = 2804639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2804693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3121 + ... + 3917.

It is an arithmetic number, because the mean of its divisors is an integer number (186732).

2^2804643 is an apocalyptic number.

2804643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2804643 is a deficient number, since it is larger than the sum of its proper divisors (1676925).

2804643 is a wasteful number, since it uses less digits than its factorization.

2804643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2804643 is about 1674.7068400171. The cubic root of 2804643 is about 141.0238378287.

The spelling of 2804643 in words is "two million, eight hundred four thousand, six hundred forty-three".