2209320 has 144 divisors (see below), whose sum is σ = 8023860. Its totient is φ = 525312.

The previous prime is 2209313. The next prime is 2209327. The reversal of 2209320 is 239022.

It is an interprime number because it is at equal distance from previous prime (2209313) and next prime (2209327).

It can be written as a sum of positive squares in 2 ways, for example, as 2196324 + 12996 = 1482^2 + 114^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2209293 and 2209302.

It is not an unprimeable number, because it can be changed into a prime (2209327) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 116271 + ... + 116289.

2^2209320 is an apocalyptic number.

2209320 is a gapful number since it is divisible by the number (20) 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 2209320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4011930).

2209320 is an abundant number, since it is smaller than the sum of its proper divisors (5814540).

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

2209320 is a wasteful number, since it uses less digits than its factorization.

2209320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2209320 is about 1486.3781483862. The cubic root of 2209320 is about 130.2425452217.

The spelling of 2209320 in words is "two million, two hundred nine thousand, three hundred twenty".