22243278 has 8 divisors (see below), whose sum is σ = 44486568. Its totient is φ = 7414424.

The previous prime is 22243229. The next prime is 22243283. The reversal of 22243278 is 87234222.

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

22243278 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853601 + ... + 1853612.

It is an arithmetic number, because the mean of its divisors is an integer number (5560821).

Almost surely, 2^22243278 is an apocalyptic number.

22243278 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.

22243278 is a wasteful number, since it uses less digits than its factorization.

22243278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707218.

The product of its digits is 10752, while the sum is 30.

The square root of 22243278 is about 4716.2779816292. The cubic root of 22243278 is about 281.2329893909.

The spelling of 22243278 in words is "twenty-two million, two hundred forty-three thousand, two hundred seventy-eight".