2809422 has 48 divisors (see below), whose sum is σ = 7592832. Its totient is φ = 729360.

The previous prime is 2809409. The next prime is 2809423. The reversal of 2809422 is 2249082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809423) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 373 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (158184).

2^2809422 is an apocalyptic number.

2809422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2809422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3796416).

2809422 is an abundant number, since it is smaller than the sum of its proper divisors (4783410).

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

2809422 is a wasteful number, since it uses less digits than its factorization.

2809422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2809422 is about 1676.1330496115. The cubic root of 2809422 is about 141.1038920444.

The spelling of 2809422 in words is "two million, eight hundred nine thousand, four hundred twenty-two".