22388889 has 8 divisors (see below), whose sum is σ = 30052800. Its totient is φ = 14825456.

The previous prime is 22388879. The next prime is 22388917. The reversal of 22388889 is 98888322.

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 22388889 - 2⁵ = 22388857 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22388879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24597 + ... + 25490.

It is an arithmetic number, because the mean of its divisors is an integer number (3756600).

Almost surely, 2^22388889 is an apocalyptic number.

It is an amenable number.

22388889 is a deficient number, since it is larger than the sum of its proper divisors (7663911).

22388889 is a wasteful number, since it uses less digits than its factorization.

22388889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50239.

The product of its digits is 442368, while the sum is 48.

The square root of 22388889 is about 4731.6898672673. The cubic root of 22388889 is about 281.8453329216.

It can be divided in two parts, 22 and 388889, that multiplied together give a palindrome (8555558).

The spelling of 22388889 in words is "twenty-two million, three hundred eighty-eight thousand, eight hundred eighty-nine".