220691712 has 72 divisors (see below), whose sum is σ = 592792704. Its totient is φ = 72884224.

The previous prime is 220691701. The next prime is 220691747. The reversal of 220691712 is 217196022.

It is a self number, because there is not a number n which added to its sum of digits gives 220691712.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 85513 + ... + 88055.

It is an arithmetic number, because the mean of its divisors is an integer number (8233232).

Almost surely, 2^220691712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220691712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296396352).

220691712 is an abundant number, since it is smaller than the sum of its proper divisors (372100992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220691712 is a wasteful number, since it uses less digits than its factorization.

220691712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 220691712 is about 14855.6962812249. The cubic root of 220691712 is about 604.3130987835.

The spelling of 220691712 in words is "two hundred twenty million, six hundred ninety-one thousand, seven hundred twelve".