22749309 has 16 divisors (see below), whose sum is σ = 36767040. Its totient is φ = 13787280.

The previous prime is 22749283. The next prime is 22749343. The reversal of 22749309 is 90394722.

It is not a de Polignac number, because 22749309 - 2⁹ = 22748797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22749409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38002 + ... + 38595.

It is an arithmetic number, because the mean of its divisors is an integer number (2297940).

Almost surely, 2^22749309 is an apocalyptic number.

It is an amenable number.

22749309 is a deficient number, since it is larger than the sum of its proper divisors (14017731).

22749309 is a wasteful number, since it uses less digits than its factorization.

22749309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76617 (or 76611 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 22749309 is about 4769.6235700525. The cubic root of 22749309 is about 283.3496865609.

The spelling of 22749309 in words is "twenty-two million, seven hundred forty-nine thousand, three hundred nine".