223740660 has 192 divisors, whose sum is σ = 746807040. Its totient is φ = 49336320.

The previous prime is 223740589. The next prime is 223740661. The reversal of 223740660 is 66047322.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223740661) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 763474 + ... + 763766.

It is an arithmetic number, because the mean of its divisors is an integer number (3889620).

Almost surely, 2^223740660 is an apocalyptic number.

223740660 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 223740660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373403520).

223740660 is an abundant number, since it is smaller than the sum of its proper divisors (523066380).

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

223740660 is a wasteful number, since it uses less digits than its factorization.

223740660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 223740660 is about 14957.9630966252. The cubic root of 223740660 is about 607.0833261915.

Adding to 223740660 its reverse (66047322), we get a palindrome (289787982).

The spelling of 223740660 in words is "two hundred twenty-three million, seven hundred forty thousand, six hundred sixty".