220689730 has 8 divisors (see below), whose sum is σ = 397241532. Its totient is φ = 88275888.

The previous prime is 220689709. The next prime is 220689737. The reversal of 220689730 is 37986022.

220689730 is digitally balanced in base 2, 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 217769049 + 2920681 = 14757^2 + 1709^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 220689730.

It is not an unprimeable number, because it can be changed into a prime (220689737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11034477 + ... + 11034496.

Almost surely, 2^220689730 is an apocalyptic number.

220689730 is a deficient number, since it is larger than the sum of its proper divisors (176551802).

220689730 is a wasteful number, since it uses less digits than its factorization.

220689730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22068980.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 220689730 is about 14855.6295726570. The cubic root of 220689730 is about 604.3112896956.

The spelling of 220689730 in words is "two hundred twenty million, six hundred eighty-nine thousand, seven hundred thirty".