220385828 has 12 divisors (see below), whose sum is σ = 415342620. Its totient is φ = 101716512.

The previous prime is 220385779. The next prime is 220385831. The reversal of 220385828 is 828583022.

It can be written as a sum of positive squares in 2 ways, for example, as 20502784 + 199883044 = 4528^2 + 14138^2 .

It is a super-3 number, since 3×220385828³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220385791 and 220385800.

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, 2119043 + ... + 2119146.

It is an arithmetic number, because the mean of its divisors is an integer number (34611885).

Almost surely, 2^220385828 is an apocalyptic number.

It is an amenable number.

220385828 is a deficient number, since it is larger than the sum of its proper divisors (194956792).

220385828 is a wasteful number, since it uses less digits than its factorization.

220385828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238206 (or 4238204 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 220385828 is about 14845.3975359369. The cubic root of 220385828 is about 604.0337722151.

The spelling of 220385828 in words is "two hundred twenty million, three hundred eighty-five thousand, eight hundred twenty-eight".