22304309 has 8 divisors (see below), whose sum is σ = 23580480. Its totient is φ = 21038400.

The previous prime is 22304299. The next prime is 22304327. The reversal of 22304309 is 90340322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22304309 - 2²⁰ = 21255733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22304329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2144 + ... + 7014.

It is an arithmetic number, because the mean of its divisors is an integer number (2947560).

Almost surely, 2^22304309 is an apocalyptic number.

It is an amenable number.

22304309 is a deficient number, since it is larger than the sum of its proper divisors (1276171).

22304309 is a wasteful number, since it uses less digits than its factorization.

22304309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 22304309 is about 4722.7437999536. The cubic root of 22304309 is about 281.4899697448.

The spelling of 22304309 in words is "twenty-two million, three hundred four thousand, three hundred nine".