220870 has 16 divisors (see below), whose sum is σ = 428400. Its totient is φ = 81504.

The previous prime is 220861. The next prime is 220873. The reversal of 220870 is 78022.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220873) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 720 + ... + 979.

It is an arithmetic number, because the mean of its divisors is an integer number (26775).

2²²⁰⁸⁷⁰ is an apocalyptic number.

220870 is a deficient number, since it is larger than the sum of its proper divisors (207530).

220870 is a wasteful number, since it uses less digits than its factorization.

220870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 220870 is about 469.9680840227. The cubic root of 220870 is about 60.4475788435.

Adding to 220870 its reverse (78022), we get a palindrome (298892).

It can be divided in two parts, 2208 and 70, that added together give a triangular number (2278 = T₆₇).

The spelling of 220870 in words is "two hundred twenty thousand, eight hundred seventy".