2309216 has 72 divisors (see below), whose sum is σ = 5718384. Its totient is φ = 898560.

The previous prime is 2309179. The next prime is 2309227. The reversal of 2309216 is 6129032.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2309191 and 2309200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37826 + ... + 37886.

It is an arithmetic number, because the mean of its divisors is an integer number (79422).

2^2309216 is an apocalyptic number.

2309216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2309216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859192).

2309216 is an abundant number, since it is smaller than the sum of its proper divisors (3409168).

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

2309216 is a wasteful number, since it uses less digits than its factorization.

2309216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2309216 is about 1519.6104764051. The cubic root of 2309216 is about 132.1766841223.

The spelling of 2309216 in words is "two million, three hundred nine thousand, two hundred sixteen".