22389390 has 96 divisors (see below), whose sum is σ = 61102080. Its totient is φ = 5683392.

The previous prime is 22389361. The next prime is 22389407. The reversal of 22389390 is 9398322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283371 + ... + 283449.

It is an arithmetic number, because the mean of its divisors is an integer number (636480).

Almost surely, 2^22389390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22389390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551040).

22389390 is an abundant number, since it is smaller than the sum of its proper divisors (38712690).

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

22389390 is a wasteful number, since it uses less digits than its factorization.

22389390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 22389390 is about 4731.7428078880. The cubic root of 22389390 is about 281.8474352063.

It can be divided in two parts, 2238 and 9390, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 22389390 in words is "twenty-two million, three hundred eighty-nine thousand, three hundred ninety".