222422440 has 32 divisors (see below), whose sum is σ = 501347880. Its totient is φ = 88809472.

The previous prime is 222422383. The next prime is 222422491. The reversal of 222422440 is 44224222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 145298916 + 77123524 = 12054^2 + 8782^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19032 + ... + 28408.

Almost surely, 2^222422440 is an apocalyptic number.

222422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222422440 is an abundant number, since it is smaller than the sum of its proper divisors (278925440).

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

222422440 is a wasteful number, since it uses less digits than its factorization.

222422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981 (or 9977 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 222422440 is about 14913.8338464662. The cubic root of 222422440 is about 605.8887195958. Note that the first 3 decimals are identical.

Adding to 222422440 its reverse (44224222), we get a palindrome (266646662).

The spelling of 222422440 in words is "two hundred twenty-two million, four hundred twenty-two thousand, four hundred forty".