222420660 has 192 divisors, whose sum is σ = 802013184. Its totient is φ = 44697600.

The previous prime is 222420659. The next prime is 222420677. The reversal of 222420660 is 66024222.

It is a self number, because there is not a number n which added to its sum of digits gives 222420660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142444 + ... + 143996.

It is an arithmetic number, because the mean of its divisors is an integer number (4177152).

Almost surely, 2^222420660 is an apocalyptic number.

222420660 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 222420660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401006592).

222420660 is an abundant number, since it is smaller than the sum of its proper divisors (579592524).

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

222420660 is a wasteful number, since it uses less digits than its factorization.

222420660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1612 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 222420660 is about 14913.7741702092. The cubic root of 222420660 is about 605.8871033249.

Adding to 222420660 its reverse (66024222), we get a palindrome (288444882).

The spelling of 222420660 in words is "two hundred twenty-two million, four hundred twenty thousand, six hundred sixty".