2261856 has 24 divisors (see below), whose sum is σ = 5937624. Its totient is φ = 753920.

The previous prime is 2261851. The next prime is 2261863. The reversal of 2261856 is 6581622.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11685 + ... + 11876.

It is an arithmetic number, because the mean of its divisors is an integer number (247401).

2^2261856 is an apocalyptic number.

It is an amenable number.

2261856 is an abundant number, since it is smaller than the sum of its proper divisors (3675768).

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

2261856 is a wasteful number, since it uses less digits than its factorization.

2261856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23574 (or 23566 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 2261856 is about 1503.9468075700. The cubic root of 2261856 is about 131.2668259608.

The spelling of 2261856 in words is "two million, two hundred sixty-one thousand, eight hundred fifty-six".