222278868 has 144 divisors (see below), whose sum is σ = 668443776. Its totient is φ = 60963840.

The previous prime is 222278851. The next prime is 222278887. The reversal of 222278868 is 868872222.

It is a happy number.

222278868 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×222278868² = 98815790318722848, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 790888 + ... + 791168.

Almost surely, 2^222278868 is an apocalyptic number.

222278868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222278868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334221888).

222278868 is an abundant number, since it is smaller than the sum of its proper divisors (446164908).

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

222278868 is a wasteful number, since it uses less digits than its factorization.

222278868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 409 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 222278868 is about 14909.0196860827. The cubic root of 222278868 is about 605.7583260096.

The spelling of 222278868 in words is "two hundred twenty-two million, two hundred seventy-eight thousand, eight hundred sixty-eight".