2228309 has 16 divisors (see below), whose sum is σ = 2540160. Its totient is φ = 1943040.

The previous prime is 2228299. The next prime is 2228321. The reversal of 2228309 is 9038222.

It is not a de Polignac number, because 2228309 - 2⁸ = 2228053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2228329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15962 + ... + 16100.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

2^2228309 is an apocalyptic number.

It is an amenable number.

2228309 is a deficient number, since it is larger than the sum of its proper divisors (311851).

2228309 is a wasteful number, since it uses less digits than its factorization.

2228309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2228309 is about 1492.7521562537. The cubic root of 2228309 is about 130.6146240699.

The spelling of 2228309 in words is "two million, two hundred twenty-eight thousand, three hundred nine".