222440 has 32 divisors (see below), whose sum is σ = 514080. Its totient is φ = 86592.

The previous prime is 222437. The next prime is 222461. The reversal of 222440 is 44222.

It is a happy number.

222440 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2639 + ... + 2721.

It is an arithmetic number, because the mean of its divisors is an integer number (16065).

2²²²⁴⁴⁰ is an apocalyptic number.

222440 is a gapful number since it is divisible by the number (20) 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 222440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257040).

222440 is an abundant number, since it is smaller than the sum of its proper divisors (291640).

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

222440 is a wasteful number, since it uses less digits than its factorization.

222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 222440 is about 471.6354524418. The cubic root of 222440 is about 60.5904663919.

Adding to 222440 its reverse (44222), we get a palindrome (266662).

The spelling of 222440 in words is "two hundred twenty-two thousand, four hundred forty", and thus it is an iban number.