220722672 has 20 divisors (see below), whose sum is σ = 570200360. Its totient is φ = 73574208.

The previous prime is 220722661. The next prime is 220722809. The reversal of 220722672 is 276227022.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299147 + ... + 2299242.

It is an arithmetic number, because the mean of its divisors is an integer number (28510018).

Almost surely, 2^220722672 is an apocalyptic number.

It is an amenable number.

220722672 is an abundant number, since it is smaller than the sum of its proper divisors (349477688).

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

220722672 is a wasteful number, since it uses less digits than its factorization.

220722672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598400 (or 4598394 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 220722672 is about 14856.7382692164. The cubic root of 220722672 is about 604.3413563901.

Adding to 220722672 its reverse (276227022), we get a palindrome (496949694).

The spelling of 220722672 in words is "two hundred twenty million, seven hundred twenty-two thousand, six hundred seventy-two".