22287845 has 8 divisors (see below), whose sum is σ = 26941464. Its totient is φ = 17699584.

The previous prime is 22287829. The next prime is 22287847. The reversal of 22287845 is 54878222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 22287841 = 2^2 + 4721^2 .

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 22287845 - 2⁴ = 22287829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22287799 and 22287808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15584 + ... + 16953.

It is an arithmetic number, because the mean of its divisors is an integer number (3367683).

Almost surely, 2^22287845 is an apocalyptic number.

It is an amenable number.

22287845 is a deficient number, since it is larger than the sum of its proper divisors (4653619).

22287845 is a wasteful number, since it uses less digits than its factorization.

22287845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32679.

The product of its digits is 71680, while the sum is 38.

The square root of 22287845 is about 4721.0004236390. Note that the first 3 decimals coincide. The cubic root of 22287845 is about 281.4206917765.

It can be divided in two parts, 22287 and 845, that added together give a palindrome (23132).

The spelling of 22287845 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred forty-five".