22123398 has 48 divisors (see below), whose sum is σ = 50254848. Its totient is φ = 6481200.

The previous prime is 22123393. The next prime is 22123399. The reversal of 22123398 is 89332122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123393) 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 23 ways as a sum of consecutive naturals, for example, 22015 + ... + 22997.

It is an arithmetic number, because the mean of its divisors is an integer number (1046976).

Almost surely, 2^22123398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22123398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25127424).

22123398 is an abundant number, since it is smaller than the sum of its proper divisors (28131450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22123398 is a wasteful number, since it uses less digits than its factorization.

22123398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1030 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 22123398 is about 4703.5516367953. The cubic root of 22123398 is about 280.7268445641.

The spelling of 22123398 in words is "twenty-two million, one hundred twenty-three thousand, three hundred ninety-eight".