22289993 has 8 divisors (see below), whose sum is σ = 24558336. Its totient is φ = 20062000.

The previous prime is 22289989. The next prime is 22289999. The reversal of 22289993 is 39998222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22289993 - 2² = 22289989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22289999) 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 7 ways as a sum of consecutive naturals, for example, 8921 + ... + 11142.

It is an arithmetic number, because the mean of its divisors is an integer number (3069792).

Almost surely, 2^22289993 is an apocalyptic number.

It is an amenable number.

22289993 is a deficient number, since it is larger than the sum of its proper divisors (2268343).

22289993 is a wasteful number, since it uses less digits than its factorization.

22289993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20175.

The product of its digits is 139968, while the sum is 44.

The square root of 22289993 is about 4721.2279123126. The cubic root of 22289993 is about 281.4297321634.

It can be divided in two parts, 2228 and 9993, that added together give a palindrome (12221).

The spelling of 22289993 in words is "twenty-two million, two hundred eighty-nine thousand, nine hundred ninety-three".