2781822 has 16 divisors (see below), whose sum is σ = 5580432. Its totient is φ = 924480.

The previous prime is 2781817. The next prime is 2781853. The reversal of 2781822 is 2281872.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2781822.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818 + ... + 3674.

It is an arithmetic number, because the mean of its divisors is an integer number (348777).

2^2781822 is an apocalyptic number.

2781822 is an abundant number, since it is smaller than the sum of its proper divisors (2798610).

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

2781822 is a wasteful number, since it uses less digits than its factorization.

2781822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403.

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

The square root of 2781822 is about 1667.8794920497. The cubic root of 2781822 is about 140.6402983850.

The spelling of 2781822 in words is "two million, seven hundred eighty-one thousand, eight hundred twenty-two".