22689450 has 144 divisors (see below), whose sum is σ = 72941760. Its totient is φ = 5186160.

The previous prime is 22689421. The next prime is 22689451. The reversal of 22689450 is 5498622.

It is a happy number.

It is a super-2 number, since 2×22689450² = 1029622282605000, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22689451) 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 71 ways as a sum of consecutive naturals, for example, 3241347 + ... + 3241353.

It is an arithmetic number, because the mean of its divisors is an integer number (506540).

Almost surely, 2^22689450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22689450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36470880).

22689450 is an abundant number, since it is smaller than the sum of its proper divisors (50252310).

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

22689450 is an frugal number, since it uses more digits than its factorization.

22689450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 22689450 is about 4763.3444133298. The cubic root of 22689450 is about 283.1009474765.

It can be divided in two parts, 226 and 89450, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 22689450 in words is "twenty-two million, six hundred eighty-nine thousand, four hundred fifty".