22442989 has 4 divisors (see below), whose sum is σ = 22476160. Its totient is φ = 22409820.

The previous prime is 22442969. The next prime is 22443007. The reversal of 22442989 is 98924422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98924422 = 2 ⋅49462211.

It is a cyclic number.

It is not a de Polignac number, because 22442989 - 2¹⁷ = 22311917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15549 + ... + 16930.

It is an arithmetic number, because the mean of its divisors is an integer number (5619040).

Almost surely, 2^22442989 is an apocalyptic number.

It is an amenable number.

22442989 is a deficient number, since it is larger than the sum of its proper divisors (33171).

22442989 is an equidigital number, since it uses as much as digits as its factorization.

22442989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33170.

The product of its digits is 82944, while the sum is 40.

The square root of 22442989 is about 4737.4031916230. The cubic root of 22442989 is about 282.0721651904.

The spelling of 22442989 in words is "twenty-two million, four hundred forty-two thousand, nine hundred eighty-nine".