872220 has 24 divisors (see below), whose sum is σ = 2442384. Its totient is φ = 232576.

The previous prime is 872203. The next prime is 872227. The reversal of 872220 is 22278.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872227) by changing a digit.

872220 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 7209 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (101766).

2⁸⁷²²²⁰ is an apocalyptic number.

It is an amenable number.

872220 is an abundant number, since it is smaller than the sum of its proper divisors (1570164).

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

872220 is a wasteful number, since it uses less digits than its factorization.

872220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14549 (or 14547 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 872220 is about 933.9271920230. The cubic root of 872220 is about 95.5451574127.

Adding to 872220 its reverse (22278), we get a palindrome (894498).

The spelling of 872220 in words is "eight hundred seventy-two thousand, two hundred twenty".