22888889 has 2 divisors, whose sum is σ = 22888890. Its totient is φ = 22888888.

The previous prime is 22888883. The next prime is 22888913. The reversal of 22888889 is 98888822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 7246864 = 3955^2 + 2692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22888889 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22888889.

It is not a weakly prime, because it can be changed into another prime (22888883) 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 as a sum of consecutive naturals, namely, 11444444 + 11444445.

It is an arithmetic number, because the mean of its divisors is an integer number (11444445).

Almost surely, 2^22888889 is an apocalyptic number.

It is an amenable number.

22888889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22888889 is an equidigital number, since it uses as much as digits as its factorization.

22888889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1179648, while the sum is 53.

The square root of 22888889 is about 4784.2333764147. The cubic root of 22888889 is about 283.9280094259.

The spelling of 22888889 in words is "twenty-two million, eight hundred eighty-eight thousand, eight hundred eighty-nine".