220228309 has 8 divisors (see below), whose sum is σ = 259808768. Its totient is φ = 182677680.

The previous prime is 220228273. The next prime is 220228313. The reversal of 220228309 is 903822022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220228309 - 2¹⁷ = 220097237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220228339) 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 7 ways as a sum of consecutive naturals, for example, 507222 + ... + 507655.

It is an arithmetic number, because the mean of its divisors is an integer number (32476096).

Almost surely, 2^220228309 is an apocalyptic number.

It is an amenable number.

220228309 is a deficient number, since it is larger than the sum of its proper divisors (39580459).

220228309 is a wasteful number, since it uses less digits than its factorization.

220228309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014915.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 220228309 is about 14840.0912733042. The cubic root of 220228309 is about 603.8898284868.

The spelling of 220228309 in words is "two hundred twenty million, two hundred twenty-eight thousand, three hundred nine".