2804345 has 4 divisors (see below), whose sum is σ = 3365220. Its totient is φ = 2243472.

The previous prime is 2804327. The next prime is 2804377. The reversal of 2804345 is 5434082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395641 + 2408704 = 629^2 + 1552^2 .

It is a cyclic number.

It is not a de Polignac number, because 2804345 - 2¹² = 2800249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280430 + ... + 280439.

It is an arithmetic number, because the mean of its divisors is an integer number (841305).

2^2804345 is an apocalyptic number.

It is an amenable number.

2804345 is a deficient number, since it is larger than the sum of its proper divisors (560875).

2804345 is an equidigital number, since it uses as much as digits as its factorization.

2804345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560874.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2804345 is about 1674.6178668580. The cubic root of 2804345 is about 141.0188429456.

The spelling of 2804345 in words is "two million, eight hundred four thousand, three hundred forty-five".