2209842 has 24 divisors (see below), whose sum is σ = 4966416. Its totient is φ = 736452.

The previous prime is 2209841. The next prime is 2209843. The reversal of 2209842 is 2489022.

It is an interprime number because it is at equal distance from previous prime (2209841) and next prime (2209843).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2209841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1788 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (206934).

2^2209842 is an apocalyptic number.

2209842 is an abundant number, since it is smaller than the sum of its proper divisors (2756574).

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

2209842 is an equidigital number, since it uses as much as digits as its factorization.

2209842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 4552 counting only the distinct ones).

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

The square root of 2209842 is about 1486.5537326313. The cubic root of 2209842 is about 130.2528019605.

The spelling of 2209842 in words is "two million, two hundred nine thousand, eight hundred forty-two".