863220 has 24 divisors (see below), whose sum is σ = 2417184. Its totient is φ = 230176.

The previous prime is 863197. The next prime is 863231. The reversal of 863220 is 22368.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

863220 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 7 ways as a sum of consecutive naturals, for example, 7134 + ... + 7253.

It is an arithmetic number, because the mean of its divisors is an integer number (100716).

2⁸⁶³²²⁰ is an apocalyptic number.

It is an amenable number.

863220 is an abundant number, since it is smaller than the sum of its proper divisors (1553964).

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

863220 is a wasteful number, since it uses less digits than its factorization.

863220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14399 (or 14397 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 863220 is about 929.0963351558. The cubic root of 863220 is about 95.2153930809.

Adding to 863220 its reverse (22368), we get a palindrome (885588).

The spelling of 863220 in words is "eight hundred sixty-three thousand, two hundred twenty".