2804781 has 16 divisors (see below), whose sum is σ = 4460544. Its totient is φ = 1532784.

The previous prime is 2804759. The next prime is 2804807. The reversal of 2804781 is 1874082.

2804781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2804781 - 2⁵ = 2804749 is a prime.

It is a super-2 number, since 2×2804781² = 15733592915922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2804731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2421 + ... + 3386.

It is an arithmetic number, because the mean of its divisors is an integer number (278784).

2^2804781 is an apocalyptic number.

2804781 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2804781 is a deficient number, since it is larger than the sum of its proper divisors (1655763).

2804781 is a wasteful number, since it uses less digits than its factorization.

2804781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5840.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 2804781 is about 1674.7480407512. The cubic root of 2804781 is about 141.0261507756.

The spelling of 2804781 in words is "two million, eight hundred four thousand, seven hundred eighty-one".