220732 has 12 divisors (see below), whose sum is σ = 390040. Its totient is φ = 109296.

The previous prime is 220721. The next prime is 220747. The reversal of 220732 is 237022.

It is a happy number.

220732 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

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, 358 + ... + 754.

2²²⁰⁷³² is an apocalyptic number.

It is an amenable number.

220732 is a deficient number, since it is larger than the sum of its proper divisors (169308).

220732 is a wasteful number, since it uses less digits than its factorization.

220732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 220732 is about 469.8212426019. The cubic root of 220732 is about 60.4349869663.

Adding to 220732 its product of nonzero digits (168), we get a square (220900 = 470²).

Adding to 220732 its reverse (237022), we get a palindrome (457754).

Subtracting 220732 from its reverse (237022), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 220732 in words is "two hundred twenty thousand, seven hundred thirty-two".