2805894 has 64 divisors (see below), whose sum is σ = 7687680. Its totient is φ = 738720.

The previous prime is 2805851. The next prime is 2805899. The reversal of 2805894 is 4985082.

It is a super-2 number, since 2×2805894² = 15746082278472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4629 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2^2805894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2805894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3843840).

2805894 is an abundant number, since it is smaller than the sum of its proper divisors (4881786).

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

2805894 is a wasteful number, since it uses less digits than its factorization.

2805894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2805894 is about 1675.0802965828. The cubic root of 2805894 is about 141.0448024217.

The spelling of 2805894 in words is "two million, eight hundred five thousand, eight hundred ninety-four".