22388009 has 8 divisors (see below), whose sum is σ = 26210688. Its totient is φ = 18721440.

The previous prime is 22387999. The next prime is 22388011. The reversal of 22388009 is 90088322.

It is a happy number.

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 22388009 - 2⁸ = 22387753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22378009) 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 7 ways as a sum of consecutive naturals, for example, 38717 + ... + 39290.

It is an arithmetic number, because the mean of its divisors is an integer number (3276336).

Almost surely, 2^22388009 is an apocalyptic number.

It is an amenable number.

22388009 is a deficient number, since it is larger than the sum of its proper divisors (3822679).

22388009 is an equidigital number, since it uses as much as digits as its factorization.

22388009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78055.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 22388009 is about 4731.5968763199. The cubic root of 22388009 is about 281.8416402098.

The spelling of 22388009 in words is "twenty-two million, three hundred eighty-eight thousand, nine".