2775822 has 64 divisors (see below), whose sum is σ = 6842880. Its totient is φ = 733824.

The previous prime is 2775781. The next prime is 2775841. The reversal of 2775822 is 2285772.

2775822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 52348 + ... + 52400.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2^2775822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3421440).

2775822 is an abundant number, since it is smaller than the sum of its proper divisors (4067058).

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

2775822 is a wasteful number, since it uses less digits than its factorization.

2775822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137.

The product of its digits is 15680, while the sum is 33.

The square root of 2775822 is about 1666.0798300202. The cubic root of 2775822 is about 140.5391118005.

The spelling of 2775822 in words is "two million, seven hundred seventy-five thousand, eight hundred twenty-two".