22938209 has 16 divisors (see below), whose sum is σ = 27053568. Its totient is φ = 19041792.

The previous prime is 22938193. The next prime is 22938247. The reversal of 22938209 is 90283922.

It is not a de Polignac number, because 22938209 - 2⁴ = 22938193 is a prime.

It is a super-2 number, since 2×22938209² = 1052322864255362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22932209) 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, 36869 + ... + 37485.

It is an arithmetic number, because the mean of its divisors is an integer number (1690848).

Almost surely, 2^22938209 is an apocalyptic number.

It is an amenable number.

22938209 is a deficient number, since it is larger than the sum of its proper divisors (4115359).

22938209 is a wasteful number, since it uses less digits than its factorization.

22938209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 22938209 is about 4789.3850335925. The cubic root of 22938209 is about 284.1317951073.

The spelling of 22938209 in words is "twenty-two million, nine hundred thirty-eight thousand, two hundred nine".