220394788 has 12 divisors (see below), whose sum is σ = 385933660. Its totient is φ = 110128032.

The previous prime is 220394761. The next prime is 220394791. The reversal of 220394788 is 887493022.

It is a happy number.

220394788 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 75481344 + 144913444 = 8688^2 + 12038^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9831 + ... + 23182.

Almost surely, 2^220394788 is an apocalyptic number.

It is an amenable number.

220394788 is a deficient number, since it is larger than the sum of its proper divisors (165538872).

220394788 is a wasteful number, since it uses less digits than its factorization.

220394788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34686 (or 34684 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 220394788 is about 14845.6993099012. The cubic root of 220394788 is about 604.0419579642.

The spelling of 220394788 in words is "two hundred twenty million, three hundred ninety-four thousand, seven hundred eighty-eight".