220731368 has 64 divisors (see below), whose sum is σ = 507427200. Its totient is φ = 88577280.

The previous prime is 220731361. The next prime is 220731373. The reversal of 220731368 is 863137022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (220731361) 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 15 ways as a sum of consecutive naturals, for example, 22118 + ... + 30506.

It is an arithmetic number, because the mean of its divisors is an integer number (7928550).

Almost surely, 2^220731368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220731368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253713600).

220731368 is an abundant number, since it is smaller than the sum of its proper divisors (286695832).

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

220731368 is a wasteful number, since it uses less digits than its factorization.

220731368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8442 (or 8438 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 220731368 is about 14857.0309281498. The cubic root of 220731368 is about 604.3492928704.

The spelling of 220731368 in words is "two hundred twenty million, seven hundred thirty-one thousand, three hundred sixty-eight".