2286781 has 16 divisors (see below), whose sum is σ = 2736000. Its totient is φ = 1909824.

The previous prime is 2286773. The next prime is 2286787. The reversal of 2286781 is 1876822.

It is not a de Polignac number, because 2286781 - 2³ = 2286773 is a prime.

It is a super-2 number, since 2×2286781² = 10458734683922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2286787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20181 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (171000).

2^2286781 is an apocalyptic number.

It is an amenable number.

2286781 is a deficient number, since it is larger than the sum of its proper divisors (449219).

2286781 is an equidigital number, since it uses as much as digits as its factorization.

2286781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 179 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 2286781 is about 1512.2106334767. The cubic root of 2286781 is about 131.7472397575.

The spelling of 2286781 in words is "two million, two hundred eighty-six thousand, seven hundred eighty-one".