220756 has 12 divisors (see below), whose sum is σ = 389620. Its totient is φ = 109440.

The previous prime is 220747. The next prime is 220757. The reversal of 220756 is 657022.

It can be written as a sum of positive squares in 2 ways, for example, as 188356 + 32400 = 434^2 + 180^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220757) 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, 796 + ... + 1036.

2²²⁰⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

220756 is a deficient number, since it is larger than the sum of its proper divisors (168864).

220756 is a wasteful number, since it uses less digits than its factorization.

220756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 220756 is about 469.8467835369. The cubic root of 220756 is about 60.4371772349.

Adding to 220756 its reverse (657022), we get a palindrome (877778).

The spelling of 220756 in words is "two hundred twenty thousand, seven hundred fifty-six".