220638272 has 28 divisors (see below), whose sum is σ = 438790080. Its totient is φ = 110077056.

The previous prime is 220638259. The next prime is 220638323. The reversal of 220638272 is 272836022.

It is a super-2 number, since 2×220638272² = 97362494142291968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27629 + ... + 34707.

Almost surely, 2^220638272 is an apocalyptic number.

It is an amenable number.

220638272 is a deficient number, since it is larger than the sum of its proper divisors (218151808).

220638272 is an equidigital number, since it uses as much as digits as its factorization.

220638272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578 (or 7568 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 220638272 is about 14853.8975356638. The cubic root of 220638272 is about 604.2643171615.

The spelling of 220638272 in words is "two hundred twenty million, six hundred thirty-eight thousand, two hundred seventy-two".