220128973 has 8 divisors (see below), whose sum is σ = 222430208. Its totient is φ = 217836864.

The previous prime is 220128943. The next prime is 220128977. The reversal of 220128973 is 379821022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220128973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220128977) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 52990 + ... + 56992.

It is an arithmetic number, because the mean of its divisors is an integer number (27803776).

Almost surely, 2^220128973 is an apocalyptic number.

It is an amenable number.

220128973 is a deficient number, since it is larger than the sum of its proper divisors (2301235).

220128973 is a wasteful number, since it uses less digits than its factorization.

220128973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 220128973 is about 14836.7440161243. The cubic root of 220128973 is about 603.7990181486.

Adding to 220128973 its reverse (379821022), we get a palindrome (599949995).

The spelling of 220128973 in words is "two hundred twenty million, one hundred twenty-eight thousand, nine hundred seventy-three".