220744 has 16 divisors (see below), whose sum is σ = 424620. Its totient is φ = 107520.

The previous prime is 220721. The next prime is 220747. The reversal of 220744 is 447022.

220744 is nontrivially palindromic in base 3.

220744 is digitally balanced in base 2 and base 3, because in such bases 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 191844 + 28900 = 438^2 + 170^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (220747) by changing a digit.

220744 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9 + ... + 664.

2²²⁰⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

220744 is a deficient number, since it is larger than the sum of its proper divisors (203876).

220744 is a wasteful number, since it uses less digits than its factorization.

220744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 220744 is about 469.8340132430. The cubic root of 220744 is about 60.4360821204.

Adding to 220744 its reverse (447022), we get a palindrome (667766).

The spelling of 220744 in words is "two hundred twenty thousand, seven hundred forty-four", and thus it is an iban number.