869220 has 72 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 210240.

The previous prime is 869203. The next prime is 869233. The reversal of 869220 is 22968.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1761 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (40040).

2⁸⁶⁹²²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441440).

869220 is an abundant number, since it is smaller than the sum of its proper divisors (2013660).

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

869220 is a wasteful number, since it uses less digits than its factorization.

869220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 869220 is about 932.3196876608. The cubic root of 869220 is about 95.4354890839.

It can be divided in two parts, 869 and 220, that added together give a square (1089 = 33²).

The spelling of 869220 in words is "eight hundred sixty-nine thousand, two hundred twenty".