22288218 has 8 divisors (see below), whose sum is σ = 44576448. Its totient is φ = 7429404.

The previous prime is 22288213. The next prime is 22288223. The reversal of 22288218 is 81288222.

It is an interprime number because it is at equal distance from previous prime (22288213) and next prime (22288223).

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

22288218 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22288213) 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, 1857346 + ... + 1857357.

It is an arithmetic number, because the mean of its divisors is an integer number (5572056).

Almost surely, 2^22288218 is an apocalyptic number.

22288218 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.

22288218 is a wasteful number, since it uses less digits than its factorization.

22288218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714708.

The product of its digits is 8192, while the sum is 33.

The square root of 22288218 is about 4721.0399278125. The cubic root of 22288218 is about 281.4222616805.

The spelling of 22288218 in words is "twenty-two million, two hundred eighty-eight thousand, two hundred eighteen".