22209774 has 8 divisors (see below), whose sum is σ = 44419560. Its totient is φ = 7403256.

The previous prime is 22209773. The next prime is 22209797. The reversal of 22209774 is 47790222.

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

22209774 is an admirable number.

It is a super-2 number, since 2×22209774² = 986548122262152, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22209773) 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, 1850809 + ... + 1850820.

It is an arithmetic number, because the mean of its divisors is an integer number (5552445).

Almost surely, 2^22209774 is an apocalyptic number.

22209774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22209774 is a wasteful number, since it uses less digits than its factorization.

22209774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701634.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 22209774 is about 4712.7246896037. The cubic root of 22209774 is about 281.0917157757.

Adding to 22209774 its reverse (47790222), we get a palindrome (69999996).

The spelling of 22209774 in words is "twenty-two million, two hundred nine thousand, seven hundred seventy-four".