2309220 has 36 divisors (see below), whose sum is σ = 7005180. Its totient is φ = 615744.

The previous prime is 2309179. The next prime is 2309227. The reversal of 2309220 is 229032.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 968256 = 1158^2 + 984^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 2309193 and 2309202.

It is not an unprimeable number, because it can be changed into a prime (2309227) 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, 6235 + ... + 6594.

2^2309220 is an apocalyptic number.

2309220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2309220 is an abundant number, since it is smaller than the sum of its proper divisors (4695960).

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

2309220 is a wasteful number, since it uses less digits than its factorization.

2309220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12844 (or 12839 counting only the distinct ones).

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

The square root of 2309220 is about 1519.6117925312. The cubic root of 2309220 is about 132.1767604406.

The spelling of 2309220 in words is "two million, three hundred nine thousand, two hundred twenty".