2804840 has 16 divisors (see below), whose sum is σ = 6310980. Its totient is φ = 1121920.

The previous prime is 2804839. The next prime is 2804843. The reversal of 2804840 is 484082.

It can be written as a sum of positive squares in 2 ways, for example, as 2515396 + 289444 = 1586^2 + 538^2 .

It is not an unprimeable number, because it can be changed into a prime (2804843) 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, 35021 + ... + 35100.

2^2804840 is an apocalyptic number.

2804840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2804840 is an abundant number, since it is smaller than the sum of its proper divisors (3506140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2804840 is a wasteful number, since it uses less digits than its factorization.

2804840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70132 (or 70128 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 2804840 is about 1674.7656552485. The cubic root of 2804840 is about 141.0271396210.

The spelling of 2804840 in words is "two million, eight hundred four thousand, eight hundred forty".