220928 has 18 divisors (see below), whose sum is σ = 441504. Its totient is φ = 110336.

The previous prime is 220919. The next prime is 220931. The reversal of 220928 is 829022.

It is a congruent number.

It is an unprimeable number.

220928 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176 + ... + 687.

It is an arithmetic number, because the mean of its divisors is an integer number (24528).

2²²⁰⁹²⁸ is an apocalyptic number.

It is an amenable number.

220928 is a deficient number, since it is larger than the sum of its proper divisors (220576).

220928 is an frugal number, since it uses more digits than its factorization.

220928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 220928 is about 470.0297862902. The cubic root of 220928 is about 60.4528695164.

The spelling of 220928 in words is "two hundred twenty thousand, nine hundred twenty-eight".