220385936 has 20 divisors (see below), whose sum is σ = 428869500. Its totient is φ = 109709952.

The previous prime is 220385903. The next prime is 220385941. The reversal of 220385936 is 639583022.

It can be written as a sum of positive squares in 2 ways, for example, as 142945936 + 77440000 = 11956^2 + 8800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220385936.

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, 26411 + ... + 33738.

It is an arithmetic number, because the mean of its divisors is an integer number (21443475).

Almost surely, 2^220385936 is an apocalyptic number.

It is an amenable number.

220385936 is a deficient number, since it is larger than the sum of its proper divisors (208483564).

220385936 is a wasteful number, since it uses less digits than its factorization.

220385936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60386 (or 60380 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 220385936 is about 14845.4011734274. The cubic root of 220385936 is about 604.0338708839.

The spelling of 220385936 in words is "two hundred twenty million, three hundred eighty-five thousand, nine hundred thirty-six".