2811822 has 48 divisors (see below), whose sum is σ = 6324480. Its totient is φ = 832416.

The previous prime is 2811803. The next prime is 2811833. The reversal of 2811822 is 2281182.

It is a junction number, because it is equal to n+sod(n) for n = 2811792 and 2811801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47629 + ... + 47687.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2^2811822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2811822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3162240).

2811822 is an abundant number, since it is smaller than the sum of its proper divisors (3512658).

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

2811822 is a wasteful number, since it uses less digits than its factorization.

2811822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 124 counting only the distinct ones).

The product of its digits is 512, while the sum is 24.

The square root of 2811822 is about 1676.8488303959. The cubic root of 2811822 is about 141.1440607997.

The spelling of 2811822 in words is "two million, eight hundred eleven thousand, eight hundred twenty-two".